Well, your equation probably looks like this: 4x + 5 = -7
So you would follow these steps to get x by itself.
4x + 5 = -7
Subract 5 from both sides and you get 4x = -12
4x = -12
Divide both sides by 4 to get x by itself
x = -3
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5+4x-7 = 4x+3-x 4x-2 = 3x+3 4x-3x = 3+2 x = 5
4x+7-8x=17-4x+7=17-4x=10x = -5/2
10x-7=4x+5 +7 +7 10x=4x+12 -4x -4x 6x=12 /6 /6 x=2
4x plus 7 plus 3x equals 19 plus xx = 2
3x+4-7x=5-4x+2 -4x+4=7-4x Adding 4x to each side yields: 4=7, which is not true, so there is no answer (a null set)