Question

Solve the equations :

(a) 3 ( x - 1) + 7 = 11

(b) 20 - ( 2x - 5) = 25

(c) 4 ( x + 1) = 16

(d) (Y - 7) - 1 = 0​

Answer 1

Given:-

• To solve the equation.

To find:-

• Value of x in 1) 3 (x-1)+7=11

Solution:-

• 3 (x-1)+7=11

• 3(x-1)=11-7

• 3x=4+1

• 3x=5

• x=5/3

Hey mate ! your first equation answer is 5/3

Varifying:-

Insert 5/3 in place of x.

• 3×5/3-1+7=11

• 5-1+7=11

• 4+7=11

• 11=11

• 0=0

Hence L.H.S.=R.H.S.

hence proved!

To Find:-

• Value of x in 2)20-(2x-5)=25

Solution:-

• 20-(2x-5)=25

• 20-(2x)=25+5

• 20-(2x)=30

• 2x=30-20

• x=10/2

• x=5

Hey mate! Answer is second equation is 5.

Varifying:-

insert 5 in place of x.

• 20-2×5-5=25

• 20-10-5=25

• 30-5=25

• 25=25

• 0=0

Hence L.H.S.=R.H.S.

hence proved!

To find:-

• value of x in 3) 4(x+1)=16

Solution:-

• 4(x+1)=16

• x+1=16/4

• x+1=4

• x=4-1

• x=3

Hey mate! Value of x in this equation is 3.

Varifying:-

• 4×3+1=16

• 4×4=16

• 16=16

• 0=0

Hence verified!

To find:-

• value of x in Y-7 (-1)=0

Solution:-

• Y-7-1=10

• Y-7=10+1

• Y-7=11

• Y=11+7

• Y=18

hey mate! answer of this equation is 18.

Verifying:-

• 18-7-1=10

• 18-8=10

• 10=10

• 0=0

Hope it was helpful...

Thanks for asking....☺❤

Answer 2

1) x= 5/3

2)x=5

3)x=3

4) Y=18

Thanku ❤