x/2+(21+x)=90

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Solution for x/2+(21+x)=90 equation: 



x/2+(21+x)=90

We move all terms to the left:

x/2+(21+x)-(90)=0

We add all the numbers together, and all the variables

x/2+(x+21)-90=0

We get rid of parentheses

x/2+x+21-90=0

We multiply all the terms by the denominator


x+x*2+21*2-90*2=0

We add all the numbers together, and all the variables

x+x*2-138=0

Wy multiply elements

x+2x-138=0

We add all the numbers together, and all the variables

3x-138=0

We move all terms containing x to the left, all other terms to the right

3x=138

x=138/3

x=46

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