a) 15x - 8x = 27x = 2x = 21 / x = 3
2x + 4x = 36x = 3x = 30 / x = 5
4y + 2y - y = 25y = 2y = 20 / y = 4
7y + y - 2y = 26y = 2y = 24 / y = 4
3x - x = 12x = 1x = 12 / x = 6
x + 8x = 79x = 7x = 72 / x = 8
Итак, решения уравненийx = 3; x = 5; y = 4; x = 6; x = 8.
a) 15x - 8x = 2
7x = 2
x = 21 /
x = 3
2x + 4x = 3
6x = 3
x = 30 /
x = 5
4y + 2y - y = 2
5y = 2
y = 20 /
y = 4
7y + y - 2y = 2
6y = 2
y = 24 /
y = 4
3x - x = 1
2x = 1
x = 12 /
x = 6
x + 8x = 7
9x = 7
x = 72 /
x = 8
Итак, решения уравнений
x = 3; x = 5; y = 4; x = 6; x = 8.