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8.4x+0.3(x-4)=8.7x-1.2
We move all terms to the left:
8.4x+0.3(x-4)-(8.7x-1.2)=0
We multiply parentheses
8.4x+0.3x-(8.7x-1.2)-1.2=0
We get rid of parentheses
8.4x+0.3x-8.7x+1.2-1.2=0
We add all the numbers together, and all the variables
-15x+1.7763568394E=0
We add all the numbers together, and all the variables
-15x+4.8286385174=0
We move all terms containing x to the left, all other terms to the right
-15x=-4.8286385174
x=-4.8286385174/-15
x=2.64056480898/8.20282404492
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