Question

Resolva as expressões Algébricas a seguir: a) 3x + 7 - 2x =8 ; b) 20x - 3x = 34 ; c) 2x - 5x + 7x =20

Answer 1

A) x=1 ; B) x=2 C)x=5

Answer 2

A) 3x + 7 - 2x =8
3x+2x=8+7
5x=15
X=15/5
X=3

B) 20x - 3x = 34
17x=34
X=34/17
X=2

C) 2x - 5x + 7x =20
10x=20
X=20/10
X=2