A)8x-15= -12+5x B) 15x+12=9x-6

Question

A)8x-15= -12+5x B) 15x+12=9x-6

Answer 1

8х - 15 = - 12 + 5х
8х - 5х = 15 - 12
3х = 3
х = 1
-------------------------
15х + 12 = 9х - 6
15х - 9х = - 12 - 6
6х = - 18
  х = - 3

Answer 2

А) 8х -5х = 15 -12
3х = 3
х = 3:3
х = 1
Проверка:
8*1 -15 = -12 +5*1
8 -15 = -12 +5
-7 = -7
Б) 15х -9х = -6 -12
6х = -18
х = -18:6
х = -3
Проверка:
15*(-3) +12 = 9*(-3) -6
-45 +12 = -27 -6
-33 = -33

Comments

Исправьте в А) х=3:3 (описка х=363)