Question

Check whether the value given in the bracket is a solution to the given equation or not: (i) 4x – 15 = 13 (x = 7) (ii) 5y – 10 = - 21 (y = -3)

Answer 1

Answer:

1. Yes..

4(7) - 15 = 13

28 - 15 = 13

13 = 13..

2. no...

5(-3) - 10 = -21

-15 - 10 = -21

-25 is not equals to - 21..

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Answer 2

Step-by-step explanation:

( i) 4x-15=13

=>4x=13+15

=>4x=28

=> x =28÷4

=> x=7

(ii) 5y -10= - 21

=>5y= -21+10

=>5y= -11

=>y= -11÷5

=>y= -2.5