Substitute = into equation . x 8y = 2x 3 – 8y = 3 Solve for – y. 8y = 3 – 8y = – 8y = Divide by 8. = y Method 2 = x y – –2 = y x – Since equation is solved for substitute for in equation . y, y = x y – –2 = Use the distributive property. x – –2 + = Collect like terms. x – –2 + = Solve for x. –2 = –2 – = Divide by – = x – = x – (Solution continues.)
Substitute x = into equation . 8y = 2x – 3 8y = – 3 Solve for y. 8y = – 3 8y = – 8y = Divide by 8. y = Method 2 x – y = –2 y = x – Since equation is solved for y, substitute for y in equation . x – y = –2 x – = –2 Use the distributive property. x – + = –2 Collect like terms. + = –2 Solve for x. = –2 – = – Divide by x = – x = – (Solution continues.)
miap_ch_7_notes_answer_key.docx