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0.7x-(x-3)=-0.3x-9
We move all terms to the left:
0.7x-(x-3)-(-0.3x-9)=0
We get rid of parentheses
0.7x-x+0.3x+3+9=0
We add all the numbers together, and all the variables
-17x+12-5.5511151231258E=0
We add all the numbers together, and all the variables
-17x-3.0894953668771=0
We move all terms containing x to the left, all other terms to the right
-17x=3.0894953668771
x=3.0894953668771/-17
x=-2.8357122579904/15.603554192918
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