PR1ME (cont.) WEEK 2 I DAY 1
1 2
c) Solve
q – 5 = 10.
I can carry out the same operations on both sides until only q is left on one side.
1 2 q – 5 + 5 = 10 + 5
Add 5 to both sides
1 2
q = 15
1 2
q × 2 = 15 × 2
Multiply by 2 on both sides
1
1 2
1 2
q × 2 =
× 2 × q
= q 1
q = 30
q = 30 is a solution of 1 2
q – 5 = 10.
Check: When q = 30 ,
1 2
1 2
× 30 – 5
q – 5 =
= 15 – 5 = 10
✓
Practice s 3 1. Use the balance method to solve these equations. Fill in each with +, –, × or ÷. a) j – 14 = 18 Practice 3
j – 14 + 14 = 18 +
j =
b)
3 f – 19 = 17
= 17
3 f – 19
3 f =
3 f
=
f =
11
36 Scholar Zone Summer: Math
ISBN 978-981-09-0495-1
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