Question

If -1/2x+5=1 find the value of 8x

Answer 1

`\huge\boxed{8x=64}`

Explanation:

`-(1)/(2)x+5=1\qquad|\text{subtract 5 from both sides}\\\\-(1)/(2)x+5-5=1-5\\\\-(1)/(2)x=-4\qquad|\text{multiply both sides by (-2)}\\\\(-2\!\!\!\!\diagup)\cdot\left(-(1)/(2\!\!\!\!\diagup)x\right)=(-2)(-4)\\\\x=8\qquad|\text{multiply both sides by 8}\\\\8\cdot x=8\cdot 8\\\\8x=64`