Question

Rezolvă ecuatiile :

a) 5x + 2 = 22
b) 3x - 1 = 170
c) 19 + 7x = 89
d) 15x + 3 = 378 .

Dau coroana.

Answer 1

a) 5x + 2 = 22
5x = 22 - 2
5x = 20
x = 20 ÷ 5
x = 4

b) 3x - 1 = 170
3x = 1 + 170
3x = 171
x = 171 ÷ 3
x = 57

c) 19 + 7x = 89
7x = 89 - 19
7x = 70
x = 70 ÷ 7
x = 10

d) 15x + 3 = 378
15x = 378 - 3
15x = 375
x = 375 ÷ 15
x = 25 .

Answer 2

a) 5x=22-2; x=20/5; x=4.
b) 3x= 170+1; x=171/3; x=57.
c) 7x=89-19; x=70/7; x=10.
d) 15x=378-3; x=375/15; x=25.