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0.8(x+20)-4.5=0.7(5+x)-0.9
We move all terms to the left:
0.8(x+20)-4.5-(0.7(5+x)-0.9)=0
We add all the numbers together, and all the variables
0.8(x+20)-(0.7(x+5)-0.9)-4.5=0
We multiply parentheses
0.8x-(0.7(x+5)-0.9)+16-4.5=0
We calculate terms in parentheses: -(0.7(x+5)-0.9), so:We add all the numbers together, and all the variables
0.7(x+5)-0.9
We multiply parentheses
0.7x+3.5-0.9
We add all the numbers together, and all the variables
0.7x+2.6
Back to the equation:
-(0.7x+2.6)
0.8x-(0.7x+2.6)+11.5=0
We get rid of parentheses
0.8x-0.7x-2.6+11.5=0
We add all the numbers together, and all the variables
0.1x+8.9=0
We move all terms containing x to the left, all other terms to the right
0.1x=-8.9
x=-8.9/0.1
x=-89
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