Question

Determină nr. nat. care verifică egalitatea: 5·( x-13)-12=43

Answer 1

$5 \times (x - 13) - 12 = 43 \\ 5x - 65 - 12 = 43 \\ 5x - 77 = 43 \\ 5x = 43 + 77 \\ 5x = 120 \\ x = 24$

Answer 2

5·( x-13)-12=43
5x-65=43+12
5x-65=55
5x=55+65
5x=120
x=120:5
x=24