THE INDIAN PUBLIC SCHOOL
GRADE 8- MATH - CHAPTER - 8
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1.​ Solve the following simultaneous equations
a)​2x + 3y = 6 , x + y = 1
b)​7a + 3b =22 , 4a + b = 22
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c)​5 c - 4 d = 29 , c + 3 d = 21
d)​6x - 8y = 19 , 10 x + 2y = 1
2. Rearrange the following equations to make x the subject
a)​Y = 43x + 5
b)​Q = 35(x+5)
c)​H = (30 / x ) + 34 y
3. Consider the equation 4(x + y) = 3x + 3
a)​Rearrange this equations to make y the subject
b)​Find the value of y when x = 2
4. If twice the age of son is added to age of father, the sum is 56. But if
twice the age of the father is added to the age of the son, the sum is 82.
Find the ages of father and son.
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6.
The region labelled R satisfies three inequalities.
State the three inequalities
7.Two pens and one eraser cost Rs. 35 and 3 pencil and four erasers cost
Rs. 65. Find the cost of pencil and eraser separately.
8. Represent the following inequality on the number line.
a)​X > 4
b) x > -4
e) x ≤ -4
f) -4 ≤ x ≤ 6
c) x <4
d) x < -4