1000-х=35+6×8
1000 - x = 35 + 48
1000 - x = 83
x = 1000 - 83
x = 917
81÷у=63÷7
81 : y = 9
y = 81 : 9
y = 9
х×8=100-(4×9)
x * 8 = 100 - 36
8x = 64
x = 64 : 8
x = 8