Question

4x+20=76 3x-15=27 7x-3乘5=55 7x+2=4.5 4x-1.5x=22.5 2(x-1.3)=8

Answer 1

4x+20=76

4x=76-20

4x=56

x=56÷4

x=14

3x-15=27

3x=27+15

3x=42

x=42÷3

x=14

7x-3乘5=55

7x-15=55

7x=55+15

7x=70

x=70÷7

x=10

7x+2=4.5

7x=4.5-2

7x=2.5

x=2.5÷7

x=5/14

4x-1.5x=22.5

(4-1.5)x=22.5

2.5x=22.5

x=22.5÷2.5

x=9

2(x-1.3)=8

x-1.3=8÷2

x-1.3=4

x=4+1.3

x=5.3

(x+3)除以2=6.5

x+3=6.5×2

x+3=13

x=13-3

x=10