Question

5) Resolva as seguintes expressões :
a)2x+15=35 b)3x+12=x+36 c)4x+13=x+49 d)5x-12=3x+24

Answer 1

Resposta:

a) 10

b) 12

c) 12

d) 18

Explicação passo-a-passo:

a) $2x+15=35\\2x=35-15\\2x=20\\x=10$

b) $3x+12=x+36\\3x-x=36-12\\2x=24\\x=12$

c) $4x+13=x+49\\4x-x=49-13\\3x=36\\x=12$

d) $5x-12=3x+24\\5x-3x=24+12\\2x=36\\x=18$