1)x-7=231÷7=33
x=33+7=40
2)x=312÷8=39
3)5x=225
x=225÷5=45
1) 7(x-7) = 231
x - 7 = 33
x = 33 + 7
x = 40
2) 312 : х = 8
312 : х = 8, х ≠ 0
312/х = 8
312 = 8х
8х = 312
х = 39
3) 16х - 11х = 225
5х = 225
х = 45
1)x-7=231÷7=33
x=33+7=40
2)x=312÷8=39
3)5x=225
x=225÷5=45
1) 7(x-7) = 231
x - 7 = 33
x = 33 + 7
x = 40
2) 312 : х = 8
312 : х = 8, х ≠ 0
312/х = 8
312 = 8х
8х = 312
х = 39
3) 16х - 11х = 225
5х = 225
х = 45