Question

4. Solve the following equations and check your result in each case.
i. 3x + 3 = 30
ii. 5x + 10 = -15
iii. 3m = 21
iv. 5y = 0
v. 4x + 3 = 7x - 3 vi. -n/3=4​

Answer 1

Answer:

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Step-by-step explanation:

i 3x + 3=30

3x=27

x=9

verify 3×9+3=30

27+3=30

30=30

verified

ii 5x+10=-15

5x=-15-10

5x=-25

x=-5

5×-5+10=-15

-25+10=-15

-15=-15

iii 3m =21

m=7

3×7=21

verified

iv 5y=0

y=0/5

Y=0

5×0=0

verified

v 4x+3=7x

3=3x

x=1

4×1+3=7×1

7=7

verified

vi -n/3=4

-n=12

n=-12

12/3=4

4=4

verified