8th Maths 2.1
Chapter 2
Linear Equations in One Variable
NCERT Class 8th solution of Exercise 2.2
NCERT Class 8th solution of Exercise 2.3
NCERT Class 8th solution of Exercise 2.4
NCERT Class 8th solution of Exercise 2.5
NCERT Class 8th solution of Exercise 2.6
Exercise 2.1
Solve the following equations.
Q1. x-2=7
Solution :
x-2=7
Add 2 on both sides.
x-2+2=7+2
x=9
Answer :
x=9
Q2. y+3=10
Solution :
y+3=10
Subtract 3 on both sides.
y+3-3=10-3
y=7
Answer :
y=7
Q3. 6=z+2
Solution :
6=z+2
Subtract 2 on both sides.
6-2=z+2-2
4=z
Answer :
z=4
Q4. 37+x=177
Solution :
37+x=177
Subtract 37 on both sides.
37+x-37=177-37
x=17-37
x=147
x=2
Answer :
x=2
Q5. 6x=12
Solution :
6x=12
Dividing both sides by 6.
6x6=126
x=2
Answer :
x=2
Q6. t5=10
Solution :
t5=10
Multiply 5 on both sides.
t×55=10×5
t=50
Answer :
t=50
Q7. 2x3=18
Solution :
2x3=18
Multiply 3 on both sides.
2x×33=18×3
2x=18×3
Dividing both sides by 2
2x2=18×32
x=9×3
x=27
Answer :
x=27
Q8. 1.6=y1.5
Solution :
1.6=y1.5
Multiply 1.5 on both sides.
1.6×1.5=y×1.51.5
y=2.4
Answer :
y=2.4
Q9.7x-9=16
Solution :
7x-9=16
Add 9 on both sides.
7x-9+9=16+9
7x=25
Dividing both sides by 7.
7x7=257
x=257
Answer :
x=257
Q10. 14y-8=13
Solution :
14y-8=13
Add 8 on both sides.
14y-8+8=13+8
14y=21
Dividing both sides by 14.
14y14=2114
y=32
Answer :
y=32
Q11. 17+6p=9
Solution :
17+6p=9
Subtract 17 on both sides.
17-17+6p=9-17
6p=-8
Dividing both sides by 6.
6p6=-86
p=-43
Answer :
p=-43
Q12. x3+1=715
Solution :
x3+1=715
Subtract 1 on both sides.
x3+1-1=715-1
x3=7-1515
x3=-815
Multiply 3 on both sides.
x×33=-8×315
x=-85
Answer :
x=-85
Comments
1) 4z+3=6+2z
2) 2/3×+1=7/15+3
3) 2y+5/3=26/3-y