1) 5у+3(7у+18)=106
5y + 21y + 54 = 106
5y + 21y = 106 – 54
26y = 52
y = 2
2) 8х+4(13х+32)=308
8x + 52x + 128 = 308
8x + 52x = 308 – 128
60x = 180
x = 3
3) 5(11х-31)-9х=121
55x – 155 – 9x = 121
55x – 9x = 121 + 155
46x = 276
x = 6
1) 5у+3(7у+18)=106
5y + 21y + 54 = 106
5y + 21y = 106 – 54
26y = 52
y = 2
2) 8х+4(13х+32)=308
8x + 52x + 128 = 308
8x + 52x = 308 – 128
60x = 180
x = 3
3) 5(11х-31)-9х=121
55x – 155 – 9x = 121
55x – 9x = 121 + 155
46x = 276
x = 6