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60*2+b*2=100*2
We simplify the equation to the form, which is simple to understand
60*2+b*2=100*2
Simplifying:
+120+b*2=100*2
Simplifying:
+120+2b=100*2
Simplifying:
+120+2b=+200
We move all terms containing b to the left and all other terms to the right.
+2b=+200-120
We simplify left and right side of the equation.
+2b=+80
We divide both sides of the equation by 2 to get b.
b=40
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