Question

比x的3.5倍多12的数十19,求x.3.2-x的四倍等于0 8个x相加的和比15多9,求x

Answer 1

3.5x+12=19

3.5x=19-12=7

x=7÷3.5

x=2

4(3.2-x)=0

3.2-x=0÷4=0

x=3.2

8x-15=9

8x=9+15

8x=24

x=24÷8

x=3