What are the coordinates (x, y) at which the graphs of 3.6x − 2y = 6 and −2.7x + y = 3 intersect? Round to the nearest tenth if necessary.
1 answer:
3.6x - 2y = 6 -2.7x + y = 3.....multiply by 2 ---------------- 3.6x - 2y = 6 -5.4x + 2y = 6 (result of multiplying by 2) ----------------add -1.8x = 12 x = 12/-1.8 x = - 6.67 (or -20/3) 3.6x - 2y = 6 3.6(-6.67) - 2y = 6 -24.01 - 2y = 6 -24.01 - 6 = 2y -30.01 = 2y -30.01 / 2 = y -15 = y solution : (-6.67, -15)
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