Question

1.
a) x + 3 = 17
b) 2x - 3 = 13
c) 2x - 4 = x + 7
d) 7x + 15 = 35
e) 13x +45 = 38
Dau coroană ​

Answer 1

Explicație pas cu pas:

a ) x + 3 = 17

x = 17 - 3

x = 14

b ) 2x - 3 = 13

2x = 13 + 3

2x = 16

x = 16 : 2

x = 8

c ) 2x - 4 = x + 7

2x - x = 4 + 7

x = 11

d ) 7x + 15 = 35

7x = 35 - 15

7x = 20

x = 20 / 7

e ) 13x + 45 = 38

13x = 38 - 45

13x = -7

x = - 7 / 13