Question

A/70-5(x-3)=45
B/10+2x=4⁵÷4³
C/7.(x-14)+35=25+279÷9
D/324-(318-x)=115

can gao a hua k

Answer 1

`a, 5(x-3) = 25`

`x-3 =5`

`x=8`

`b, 2x = 16 - 10`

`x = 3`

`c, 7(x-14) + 35 = 56`

`7(x-14) = 21`

`x-14=3`

`x = 17`

`d, 318 - x = 209`

`x = 109`

Answer 2

a)

70-5(x-3)=45

5(x-3)=70-45

5(x-3)=25

x-3=25:5

x-3=5

x=8

b)

10+2x=4⁵÷4³

10+2x=16

2x=16-10

2x=6

x=3

c)

7.(x-14)+35=25+279÷9

7.(x-14)+35=56

7.(x-14) = 56-35

7.(x-14) = 21

x-14=3

x=17

d)

324-(318-x)=115

318-x=324-115

318-x=209

x=109

Answer 3

5(x-3)=70-45

5(x-3)=25

x-3=25:5

x-3=5

x=5+3=8

10+2x=16

2x=16-10

2x=6

x=6:2=3

7.(x-14)+35=56

7.(x-14)=56-35

7.(x-14)=21

x-14=21:7

x-14=3

x=3+14

x=17

324-(318-x)=115

318-x=324-115

318-x=209

x=318-209

x=109

Answer 4

a)

70-5(x-3)=45

5(x-3)=70-45

5(x-3)=25

x-3=25:5

x-3=5

x=8

b)

10+2x=4⁵÷4³

10+2x=16

2x=16-10

2x=6

x=3

c)

7.(x-14)+35=25+279÷9

7.(x-14)+35=56

7.(x-14) = 56-35

7.(x-14) = 21

x-14=3

x=17

d)

324-(318-x)=115

318-x=324-115

318-x=209

x=109