Question 627049
5+3x=7(x+3)
5+3x=7x+21
3x-7x=21-5
-4x=16
Divide by -4 both sides
-4x/-4=16/-4
x=-4


Check
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5+3x=7(x+3)
Put x=-4
5+3(-4)=7(-4+3)
5-12=7(-1)
-7=-7