Q14Multiple choice
Arpita’s present age is thrice of Shilpa. If Shilpa’s age three years ago was x. Then Arpita’s present age is (a) 3(x – 3) (b) 3x + 3 (c)3x – 9 (d) 3(x + 3) A one-step equation is one that can be solved in one step by either adding, subtracting, multiplying or dividing by one thing. There are four main methods. For example:
- (i)a + 3 = 4.2 — solve by subtracting 3 from both sides to get a = 1.2
- (ii)s – 7 = 12 — solve by adding 7 to both sides to get s = 19
- (iii)9m = 27 — solve by dividing both sides by 9 to get m = 3
- (iv)d ÷ 8 = 2 — solve by multiplying both sides by 8 to get d = 16 Before you can solve an equation, you must be able to spot what kind of equation you have.
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(iv) d ÷ 8 = 2 — solve by multiplying both sides by 8 to get d = 16 Before you can solve an equation, you must be able to spot what kind of equation you have.