Question

A) 2×-5=7

B) y/2+5=20

C) 5(n-1)=75

D) m-3=17-3m​

Answer 1

Resposta:

A) 2×-5=7

2x = 5 +7

x = 12/2

x = 6

B) y/2+5=20

$\frac{y}{2} + 5 = 20$

$\frac{y}{2} + \frac{5}{2} = \frac{20}{2}$

y + 5 *= 20

y = 20 - 5

y= 15

,

C) 5(n-1)=75

5n - 5 = 75

5n = 75+5

n = 80/5

n = 16

D) m-3=17-3m

m + 3m = 17 -3

4m = 20

m = 20/4

m = 5