-7=-9+z/2

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Solution for -7=-9+z/2 equation: 



-7=-9+z/2

We move all terms to the left:

-7-(-9+z/2)=0

We add all the numbers together, and all the variables

-(z/2-9)-7=0

We get rid of parentheses

-z/2+9-7=0

We multiply all the terms by the denominator


-z+9*2-7*2=0

We add all the numbers together, and all the variables

-1z+4=0

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

-z=-4

z=-4/-1

z=+4

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