5x + 2(3 - 4x) = 2x + 21
5x + 6 - 8x = 2x + 21Combine like terms:-3x + 6 = 2x + 21Subtract 2x from both sides:-5x + 6 = 21Subtract 6 from both sides:-5x = 15Divide by -5:x = -3
Ответ: х = -3
5x + 2(3 - 4x) = 2x + 21
5x + 6 - 8x = 2x + 21
Combine like terms:
-3x + 6 = 2x + 21
Subtract 2x from both sides:
-5x + 6 = 21
Subtract 6 from both sides:
-5x = 15
Divide by -5:
x = -3
Ответ: х = -3