4x+15-21=

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Solution for 4x+15-21= equation:


4x + 15 < -21 =0

We simplify the equation to the form, which is simple to understand 
4x+15<-21=0

We move all terms containing x to the left and all other terms to the right. 
+4x=0+15

We simplify left and right side of the equation. 
+4x=+15

We divide both sides of the equation by 4 to get x. 
x=3.75

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