solve for b.\n12 = -2(-2 + 10b) + 19b\nb =

Answer:

(-\frac{8}{1})

Explanation:

Step1: Expand the expression

$$12 = -2\times(-2)+(-2)\times10b + 19b$$ $$12=4-20b + 19b$$

Step2: Combine like - terms

$$12=4+( - 20b+19b)$$ $$12 = 4 - b$$

Step3: Isolate the variable (b)

Subtract (4) from both sides: $$12-4=4 - b-4$$ $$8=-b$$ Multiply both sides by (-1): $$b=-8$$