Question

x - 3 = 9

4x - 9 = 1 - 2x

x + 5 = 20 - 4×

9x - 4x ,+ 10 = 7x - 30

me ajudem pfvr!​

Answer 1

Explicação passo-a-passo:

x - 3 = 9 --> x = 9 + 3 --> x = 12

4x - 9 = 1 - 2x --> 4x + 2x = 1 + 9 --> 6x = 10 --> x = 10/6 --> x = 5/3

x + 5 = 20 - 4x --> x + 4x = 20 - 5 --> 5x = 15 --> x = 3

9x - 4x + 10 = 7x - 30 --> 10 + 30 = 7x + 4x - 9x --> 40 = 2x --> x = 20

Answer 2

1- x = 9+3
X = 12

2- 4x + 2x = 1+9
6x = 10

3- x + 4x = 20 - 5
5x = 15
X = 3

4- 9x-4x-7x = -30 - 10
-2x = -40
x = -20

Espero ter ajudado...