Question

1- Calcule o valor de x de modo que:

a) 2x+3=15
b)7x-1=13
c)2x-4=3
d)4x+2=-18
e)5x-2=7+6
f)10x+1=-4-5
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Answer 1

Explicação passo-a-passo:

a) 2x = 15 - 3

2x = 12

X = 12÷2

x = 6

b) 7x = 13 +1

7x = 14

X = 14÷7

x = 2

c) 2x = 3 +4

2x = 7

X = 7÷2

x = 3,5

d ) 4x = - 18 - 2

4x = - 20

x = -20 ÷ 4

x = -5

e ) 5x = 7 + 6 + 2

5x = 15

X = 15 ÷ 5

x = 5

f) 10x = - 4 - 5 - 1

10x = - 10

X = -10 ÷ 10

X = -1