2*(3*у+9)-5*у=3496 45*у+4*(25-7*у)=168

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вопрос

To solve the first equation, we first simplify the left side:
2(3у + 9) = 23у + 2*9
= 6у + 18

Now the equation becomes:
6y + 18 - 5y = 3496
y + 18 = 3496
y = 3478

Now we substitute y = 3478 into the second equation:
45y + 4(25 - 7y) = 168
453478 + 4(25 - 73478) = 168
156510 + 4(25 - 24346) = 168
156510 + 4(-24321) = 168
156510 - 97284 = 168
59226 = 168

So, the solution is y = 3478.