Question

1]determine os numeros que satisfazem as equacão a] 2x-7=35 b] 3x+8=29 c] -5x+13=28 d] 37x-11=100

Answer 1

a) 2x-7 = 35
2x = 35+7
2x = 42
x = 42/2
x = 21

b) 3x+8 = 29
3x = 29-8
3x = 21
x = 21/3
x = 7

c) -5x+13 = 28
-5x = 28-13
-5x = 15  *(-1_
5x = -15
x = -15/5
x = -3

d) 37x-11 = 100
37x = 100+11
37x = 111
x = 111/37
x = 3

Answer 2

a) 2x - 7 = 35
2x = 35 + 7
2x = 42
x = $\frac{42}{2}$
x = 21

b) 3x + 8 = 29
3x = 29 - 8
3x = 21
x = $\frac{21}{3}$
x = 7

c) - 5x + 13 = 28
- 5x = 28 - 13
- 5x = 15
- x = $\frac{15}{5}$
- x = 3
x = - 3

d) 37x - 11 = 100
37x = 100 + 11
37x = 111
x = $\frac{111}{37}$
x = 3