1) x - 100 = 700 ÷ 5x - 100 = 140x = 240
2) a + 4 × 30 = 160a + 120 = 160a = 40
3) у ÷ 2 × 6 = 120у × 3 = 120у = 40
4) 40 + c = 2 × 4040 + c = 80c = 40
Ответ: x = 240, a = 40, у = 40, c = 40.
1) x - 100 = 700 ÷ 5
x - 100 = 140
x = 240
2) a + 4 × 30 = 160
a + 120 = 160
a = 40
3) у ÷ 2 × 6 = 120
у × 3 = 120
у = 40
4) 40 + c = 2 × 40
40 + c = 80
c = 40
Ответ: x = 240, a = 40, у = 40, c = 40.