Question

Solve the following:
a) 2(x + 3) = x -4
b) 4(5x - 2) = 2(9x + 3)

Answer 1

2x + 6 = x -4

Explanation:

a) 2(x + 3) = x -4

multiply 2 by x and 3 to get them out of the parentheses

2*x = 2x 2 * 3 = 6

2x + 6 = x -4

here is a little help so you can go on

Answer 2

`\text{a) } 2(x + 3) = x -4`

`2x+6= x -4`

`2x+6-6= x -4-6`

`2x= x -10`

`2x-x= x -x-10`

`x=-10`

`\text{b) } 4(5x - 2) = 2(9x + 3)`

`20x - 8 = 18x+ 6`

`20x - 8+8 = 18x+ 6+8`

`20x = 18x+ 14`

`20x-18x = 18x-18x+ 14`

`2x = 14`

`$(2x)/(2) =(14)/(2) $`

`x=7`