1) 7 (x - 4) = 5 (x + 4)
7x - 28 = 5x + 20
7x - 5x = 20 + 28
2x = 48
x = 24
2) 3 (y + 1) = 6 (1 - y) + 6
3y + 3 = 6 - 6y + 6
3y + 6y = 6 + 6 - 3
9y = 9
y = 1
3) 2 (x - 3) - 3 (4 - x) = 5
2x - 6 - 12 + 3x = 5
2x + 3x = 5 + 6 + 12
5x = 23
x = 23/5 = 46/10 = 4,6
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1) 7 (x - 4) = 5 (x + 4)
7x - 28 = 5x + 20
7x - 5x = 20 + 28
2x = 48
x = 24
2) 3 (y + 1) = 6 (1 - y) + 6
3y + 3 = 6 - 6y + 6
3y + 6y = 6 + 6 - 3
9y = 9
y = 1
3) 2 (x - 3) - 3 (4 - x) = 5
2x - 6 - 12 + 3x = 5
2x + 3x = 5 + 6 + 12
5x = 23
x = 23/5 = 46/10 = 4,6
Подпишитесь на мой канал : HelperKnowledge — канал по