Question

doy corona hallar el valor de x
a) x12 = -9 b)3x-10=-45+2x c) x+6.(-3)=-40:5 d) 4.x -8 = 6²+2.x e) 2.x-30:6=2.5-3.x
f) √x+8¹=12:2 es para mañana​

Answer 1

Valor de X:

a)

x12 = -9

x = -9/12

x = -0, 75

b)

3x - 10 = -45 + 2x

3x - 2x = 45 + 10

x = 55

c)

x + 6 (-3) = -40 ÷ 5

x - 18 = -40 ÷ 5

x = -8 + 18

x = 10

d)

4x - 8 = 6^2 + 2x

4x - 8 = 36 + 2x

4x - 2x = 36 + 8

2x = 44/2

x = 22

e)

2x - 30 ÷ 6 = 2.5 - 3x

2x - 5 = 10 - 3x

2x + 3x = 10 + 5

5x = 15/5

x = 3

Explicación paso a paso:

$\sqrt{x + 8} = 12 \div 2 \\ \sqrt{x + 8} = 6 \\ x + 8 = 36 \\ x = 36 - 8 \\ x = 28$