Question

determine o valor em IR das seguintes equações e)3(2-2×)=-7× f)(2-2×)+7×=5(3+2×)​

Answer 1

3(2 - 2x) = - 7x

6 - 6x = - 7x

- 6x + 7x = - 6

x = - 6

(2 - 2x) + 7x = 5(3 + 2x)

2 - 2x + 7x = 15 + 10x

- 2x + 7x - 10x = 15 - 2

- 5x = 13 *(-1)

5x = - 13

x = - 13/5

Answer 2

e) 3*(2 - 2x) = -7x

6 - 6x = -7x

7x - 6x = -6

x = -6

f) (2 - 2x) + 7x = 5*(3 + 2x)​

2 - 2x + 7x = 15 + 10x

5x - 10x = 15 - 2

-5x = 13

x = -13/5