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(4 – х) + 2 (х – 3) = –13
–3 (3у + 1) – 12 = 12
(4 – х) + 2 (х – 3) = –13
–3 (3у + 1) – 12 = 12
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(4 – х) + 2 (х – 3) = –134-х+2х-6 = -13
х=-13-4+6
х=-11
–3 (3у + 1) – 12 = 12
-9у-3-12=12
-9у=12+3+12
-9у = 27
у = -3