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0.2w+0.4(7+3w)=-1.4
We move all terms to the left:
0.2w+0.4(7+3w)-(-1.4)=0
We add all the numbers together, and all the variables
0.2w+0.4(3w+7)-(-1.4)=0
We add all the numbers together, and all the variables
0.2w+0.4(3w+7)+1.4=0
We multiply parentheses
0.2w+1.2w+2.8+1.4=0
We add all the numbers together, and all the variables
1.4w+4.2=0
We move all terms containing w to the left, all other terms to the right
1.4w=-4.2
w=-4.2/1.4
w=-3+8.8817841970013E-16/1.4
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