Question

x÷7+3×0.9=4 3（0.72-x+1）=4.8(解方程)

快
4是第一题，3是第二题

Answer 1

x÷7+3×0.9=4
解： x/7+2.7=4
x/7=4-2.7
x/7=1.3
x=1.3×7
x=9.1

3（0.72-x+1）=4.8
解： 0.72-x+1=4.8/3
1.72-x=1.6
x=1.72-1.6
x=0.12

Answer 2

x÷7+3×0.9=4
x/7=4-2.7
x/7=1.3
x=1.3x7
x=9.1

3（0.72-x+1）=4.8
1.72-x=4.8÷3
x=1.72-1.6
x=0.12