7x +4y=180 find value of x and y
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We start off with two equations:
1) 7x + 7 = 112
2) 4y = 180 - 7x + 7 7x = 105 x = 15
Knowing this, we can solve for equation 2:
4y = 180 - 7(15) + 7
4y = 180 - 105 + 7
4y = 82 y = 20.5 x = 15, and y = 20.5
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