5 + 7x = -23
1. First subtract both sides by 5 to isolate the variable x
So you get this
7x = -28
2. Divide both sides by 7 to get x by itself
x = -4
the answer is x = -4
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23 = 7x + 7x - 5 = 14x - 5 14x = 23 + 5 = 28 x = 28/14 = 2
-7x + 5 = -9 -7x = -14 7x = 14 x = 2
7x is still the slope, no matter what x equals.
4x+5=7x-8 the ansewr is 3.25
The answer is nine. Seriously. Here is my work if you don't believe me: 68=8x+23+4x-7x 68=8x-7x+23+4x 68=x+23+4x 68=x+4x+23 68=5x+23 68-23=5x 45=5x x=45/5 x=9