us x=-2is the ans of the equation 3 (x-5)=4x+7
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3(x-5)=4x+7
3x+15=4x+7
so
3x-4x=7-15
-x=-8
x=8
so
x=-2 is not the correct answer of the equation
3x+15=4x+7
so
3x-4x=7-15
-x=-8
x=8
so
x=-2 is not the correct answer of the equation
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