Question

quanto é ⇒ x-3=16
⇒ x²=4 ⇒4x-4=16
⇒x-3=16
⇒3x+4=28
⇒6x+2=20

Answer 1

x - 3 = 16
x = 16/3
x² = 4
x = \/¨4
x = +ou-  2
3 x + 4 =28
3 x = 28 - 4
3 x = 24
x = 24/3
x = 8
6 x + 2 = 20
6 x = 20 - 2
6 x = 18
x = 18/6
x = 3

Answer 2

x - 3 = 16 => x = 16 + 3 => x = 19./// x^2 = 4=> x= V4 => x = 2. /// 4x - 4 = 16 => 4x = 16 + 4 => 4x = 20 => x = 20/4 => x = 5. /// 3x + 4 = 28 => 3x = 28 - 4 => 3x = 24 => x = 24/3 => x = 8. /// 6x + 2 = 20 => 6x = 20 - 2 => 6x = 18 => x = 18/6 => x = 3.