What is 5(x+1) +6 (x+2) = 7(x +3)?

Question

What is 5(x+1) +6 (x+2) = 7(x +3)?

Answer 1

5(x+1) +6 (x+2) = 7(x +3)

5(x+1) +6 (x+2)- 7(x +3)=0

5x+5+6x+12-7x-21=0

11x-7x+5+12-21=0

4x+17-21=0

4x=21-17

4x=4

x=1

Answer 2

First multiply each term within the bracket by the number outside it, and add or subtract like terms together:

5x+5+6x+12=7x+21

11x-7x         =21-5-12(when you bring a term across the = sign, the positive becomes negative, and vice versa)

4x = 4

x   = 4/4

     = 1.

Take note that if there is a negative sign outside the bracket, the signs inside it will change; so: -6(x-3) will become -6x+18.

Hope that helps a little!

Answer 3

5x + 5 + 6x +12 = 7x + 21

5x + 6x -7x = 21 - 5 - 12

4x = 4

x = 1

Answer 4

5x+5+6x+12=7x+21

11x+17=7x+21

11x-7x=21-17

4x=4

x=4/4

x=1

is it clear ?