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10b+18b-40=180
We simplify the equation to the form, which is simple to understand
10b+18b-40=180
We move all terms containing b to the left and all other terms to the right.
+10b+18b=+180+40
We simplify left and right side of the equation.
+28b=+220
We divide both sides of the equation by 28 to get b.
b=7.8571428571429
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