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4z/10+2=-10
We move all terms to the left:
4z/10+2-(-10)=0
We add all the numbers together, and all the variables
4z/10+12=0
We multiply all the terms by the denominator
4z+12*10=0
We add all the numbers together, and all the variables
4z+120=0
We move all terms containing z to the left, all other terms to the right
4z=-120
z=-120/4
z=-30
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