{"id":18393,"date":"2026-05-03T04:28:06","date_gmt":"2026-05-02T22:28:06","guid":{"rendered":"https:\/\/mcqacademy.com\/en\/mcq\/solve-a-linear-system-3\/"},"modified":"2026-05-03T04:28:06","modified_gmt":"2026-05-02T22:28:06","slug":"solve-a-linear-system-3","status":"publish","type":"mcq","link":"https:\/\/mcqacademy.com\/en\/mcq\/solve-a-linear-system-3\/","title":{"rendered":"Solve A Linear System 3"},"content":{"rendered":"<p>Solve the system 4x + -1y = 19 and 1x + 2y = -2.<\/p>\n\n<ul class=\"quiz-options wp-block-list\">\n<li>x=4, y=-3<\/li>\n<li>no unique solution<\/li>\n<li>x=-3, y=4<\/li>\n<li>x=5, y=-4<\/li>\n<\/ul>\n","protected":false},"author":39,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","topic":[2705],"subject":[1425],"education_level":[1896],"class_list":["post-18393","mcq","type-mcq","status-publish","hentry","topic-algebra","subject-mathematics","education_level-hsc"],"mcq_note":"Treat this as a pair of simultaneous linear equations. A reliable method is elimination: choose one variable, multiply the equations if needed, and add or subtract so that one variable disappears. Solving the system gives x and y values that satisfy both equations at the same time. Here the solution is x=4, y=-3. We should verify it, not just stop after solving: substituting the ordered values into 4x + -1y = 19 and 1x + 2y = -2 makes both equations true. That confirmation shows the selected answer is correct.","mcq_options":[{"right":"yes","answer":"x=4, y=-3"},{"right":"no","answer":"no unique solution"},{"right":"no","answer":"x=-3, y=4"},{"right":"no","answer":"x=5, y=-4"}],"multi_answers":"no","subject_terms":[{"id":1425,"title":"Mathematics","slug":"mathematics"}],"topic_terms":[{"id":2705,"title":"Algebra","slug":"algebra"}],"_links":{"self":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/mcq\/18393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/mcq"}],"about":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/types\/mcq"}],"author":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/users\/39"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/comments?post=18393"}],"wp:attachment":[{"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/media?parent=18393"}],"wp:term":[{"taxonomy":"topic","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/topic?post=18393"},{"taxonomy":"subject","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/subject?post=18393"},{"taxonomy":"education_level","embeddable":true,"href":"https:\/\/mcqacademy.com\/en\/wp-json\/wp\/v2\/education_level?post=18393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}