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13(z+6)=4(z-3)-5z
We move all terms to the left:
13(z+6)-(4(z-3)-5z)=0
We multiply parentheses
13z-(4(z-3)-5z)+78=0
We calculate terms in parentheses: -(4(z-3)-5z), so:We get rid of parentheses
4(z-3)-5z
We add all the numbers together, and all the variables
-5z+4(z-3)
We multiply parentheses
-5z+4z-12
We add all the numbers together, and all the variables
-1z-12
Back to the equation:
-(-1z-12)
13z+1z+12+78=0
We add all the numbers together, and all the variables
14z+90=0
We move all terms containing z to the left, all other terms to the right
14z=-90
z=-90/14
z=-6+3/7
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