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X+7=2y20+y=4xsimultaneous equation |
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Answer» Answer: x + 7 = 2 × 4x x + 7 = 8x 8x - x = 7 7x = 7 x = 7÷7 x = 1 20 + y = 4x 20 + y = 4 × 1 20 + y = 4 y = 4-20 y = -16 |
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