Question

9) Resolva:

a) 2x+3= x+4

b) 5x-3=2x+9​

Answer 1

OLÁ

A)

$2x + 3 = x + 4 \\ 2x - x + 3 = 4 \\ 2x - x = 4 - 3 \\ x = 4 - 3 \\ \red{x = 1}$

B)

$5x - 3 = 2x + 9 \\ 5x - 2x - 3 = 9 \\ 5x - 2x = 9 + 3 \\ 3x = 9 + 3 \\ 3x = 12 \\ x = \frac{12}{3} \\ \\ \red{x = 4}$

espero ter ajudado