2. Решить уравнения:
а) 7 – 2x = 9 - 3x
b) 3х – 5(2x + 3) = 15 – 4(6x – 1)
с) 1.9x +0,3(7 - x) = 2.1- 0,2х
d) 5х – 3(4x-1)=7 — 2(7х+2)
—5.6(x — 3) — 2. — -3.5х + 10​
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