Question

列方程求解

150比x的两倍多6，求x
x与4的积，加上40除240的商，和是126，求x
x的5倍比7的5倍多75，求x
什么数的5倍减去14与0,5的积，差是56

Answer 1

① 解：李告禅150 = 2 x + 6
2 x = 150 - 6
2 x = 144
x = 72

②哪尘 解：4 x + 240 ÷ 40 = 126
4 x + 6 = 126
4 x = 126 - 6
4 x = 120
x = 30

③ 解：5 x - 5 × 7 = 75
5 x - 35 = 75
5 x = 75 + 35
5 x = 120
x = 24

④ 解：友中设这个数为 x
5 x - 14 × 0.5 = 56
5 x - 7 = 56
5 x = 56 + 7
5 x = 63
x = 63 ÷ 5
x = 63 / 5

Answer 2

150=2x+6；改瞎吵
2x=144；
x=72；
4x+240/核侍神蚂40=126;
4x=126-6=120;
x=30;
5x-7*5=75;
5x=75+35=110;
x=22;
5x-14*0.5=56;
5x=56+7=63;
x=12.6