Пошаговое объяснение:
1) 4(x – 3) - 3(x + 2) =-19;
4x - 12 - 3x - 6 = -19
x - 18 = -19
x = -19+18
x = -1
3) –5(7 – x) - 4(x – 8) = 3;
-35 + 5x - 4x + 32 = 3
x - 3 = 3
x = 3+ 3
x = 6
2) 2x + 1 + 3(x - 2) = 14;
2x + 1 + 3x - 6 = 14
5x - 5 = 14
5x = 14+5
5x = 19
x = 19:5
x = 3,8
4) 2(x – 4) – 5(x – 6) = 1.
2x - 8 - 5x + 30 = 1
-3x + 22 = 1
3x = 22 - 1
3x = 21
x = 21:3
x = 7
Пошаговое объяснение:
1) 4(x – 3) - 3(x + 2) =-19;
4x - 12 - 3x - 6 = -19
x - 18 = -19
x = -19+18
x = -1
3) –5(7 – x) - 4(x – 8) = 3;
-35 + 5x - 4x + 32 = 3
x - 3 = 3
x = 3+ 3
x = 6
2) 2x + 1 + 3(x - 2) = 14;
2x + 1 + 3x - 6 = 14
5x - 5 = 14
5x = 14+5
5x = 19
x = 19:5
x = 3,8
4) 2(x – 4) – 5(x – 6) = 1.
2x - 8 - 5x + 30 = 1
-3x + 22 = 1
3x = 22 - 1
3x = 21
x = 21:3
x = 7