Question 217336
1)
3x+7=2x-5
subtract 7
3x+7-7=2x-5-7
3x=2x-12
subtract 2x
3x-2x=2x-2x-12
x=-12
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3rd 1)
-9-(-2)
-9+2=-7
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4th 1)
6x-3y^2+4
6(3)-3(-2)^2+4
18-12+4=10