7x + 2 = 158 - 6x
7x + 2 + 6x = 158 - 6x + 6x
13x + 2 - 2= 158 - 2
13x / 13 = 156/13
x = 12
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7x + 2 = 5,6
X=4.2666666666667
7x+2-2=16-27x = 147x/7 = 14/7x = 2
7x is still the slope, no matter what x equals.
-7x + 5 = -9 -7x = -14 7x = 14 x = 2