As you've written it, it can't be solved. I'll assume you mean -2x plus 8=2. -2x=-6. x=3.
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2x + 1 = 9 2x = 9 - 1 2x = 8 2x/2 = 8/2 x=4
2x+8=10... Subtract 8 on both sides, then devide by 2... 2x=2... x=1
It is: 8-2x
2x + 8 = 2(x+4)
-2x+8=3y(-2x+8)/3=yplug in values of x or y into equation to find x or yTo obtain specific values for x or y, you would need 2 equations for the two variables. You can still solve the equation for a specific variable, in terms of the other. For example, to solve for x:2x + 3y = 82x = 8 - 3yx = (8 - 3y) / 2