Substitute = 8 in equation . x = 2 – y = 2 – y 6 = 2 Collect like terms. – y = 2 6 –y – = Multiply each side by to solve for y. –y –4 –1 = 4 y Verify the solution. In each equation, substitute: = 8 and = 4 x y = 2 y – L.S. = L.S. = y – = 4 = – = 6 4 = 1 + 1 – = 2 = 2 = R.S. = R.S. For each equation, the left side is equal to the right side, so the solution is: = 8 and = 4 x y
Substitute x = 8 in equation . – y = 2 – y = 2 6 – y = 2 Collect like terms. –y = 2 – 6 –y = –4 Multiply each side by –1 to solve for y. y = 4 Verify the solution. In each equation, substitute: x = 8 and y = 4 – y = 2 L.S. = – y L.S. = = – 4 = = 6 – 4 = 1 + 1 = 2 = 2 = R.S. = R.S. For each equation, the left side is equal to the right side, so the solution is: x = 8 and y = 4
miap_ch_7_notes_answer_key.docx