Question

pessoal me ajudem !! Resolva as equações a)2×+4=8 b)4y+8=16-2y c)5m+16=4m+12 d)5×-30=20×-80 e)7b+80=4b-7 f)5t+3=2t-1​

Answer 1

Explicação passo-a-passo:

a) 2x + 4 = 8

2x = 8 - 4

2x = 4

x = 4/2

x = 2

b) 4y + 8 = 16 - 2y

4y + 2y = 16 - 8

6y = 8

y = 8/6

y = 4/3

c) 5m + 16 = 4m + 12

5m - 4m = 12 - 16

m = -4

d) 5x - 30 = 20x - 80

20x - 80 = 5x - 30

20x - 5x = -30 + 80

15x = 50

x = 50/15

x = 10/3

e) 7b + 80 = 4b - 7

7b - 4b = -7 - 80

3b = -87

b = -87/3

b = -29

f) 5t + 3 = 2t - 1

5t - 2t = -1 - 3

3t = -4

t = -4/3