Question

Решите уравнения: 1) 23×12+39x – 38x = 817; 2) 21у – 20y -15 - 8 = 11; 3)919-(25x – 24x) = 65×8; 4)47×43 - (19y-18y)=1502 =​

Answer 1

1) 23*12+39х-38х=817  

276+х=817

х=817-276

х=541

2) 21у-20у-15*8=11

у-120=11

у=11+120

у=131

3)919-(25x – 24x) = 65×8

919-(25Х-24Х)=520

919-1х=520

919-х=520

х=399

4)47×43 - (19y-18y)=1502

2021-1у=1502

2021-у=1502

х=519