Question

a)x+5=8
b)3a-5=a+1
c)2. (x-2)=2. (10-x)
d)4. (2x-3)=5. (x+3)
pfv me ajudem♡​

Answer 1

Resposta:

a) x = 3

b) a = 3

c) x = 6

d) x = 9

Explicação passo-a-passo:

a) x + 5 = 8

x = 8 - 5

x = 3

b) 3a - 5 = a + 1

3a - a = 1 + 5

2a = 1 + 5

2a = 6

a = 6/2

a = 3

c) 2 (x - 2) = 2 (10 - x)

2x - 4 = 20 - 2x

2x + 2x = 20 + 4

4x = 20 + 4

4x = 24

x = 24/4

x = 6

d) 4 (2x - 3) = 5 (x + 3)

8x - 12 = 5x + 15

8x - 5x = 15 + 12

3x = 15 + 12

3x = 27

x = 27/3

x = 9