Question

Solve the equation. 7(3x+9)=11-(x+3)

Answer 1

x = -
`(5)/(2)`

Explanation:

given

7(3x + 9) = 11 - (x + 3) ← distribute parenthesis on both sides

21x + 63 = 11 - x - 3 ( simplify right side )

21x + 63 = 8 - x ( add x to both sides )

22x + 63 = 8 ( subtract 63 from both sides )

22x = - 55 ( divide both sides by 22 )

`(22)/(22)` x = -
`(55)/(22)` , that is

x = -
`(5)/(2)`

or x = - 2.5 ( in decimal form )