What is the value of x in the equation x – y = 30, when y = 15?
2 answers:
X - y = 30
x = ? when y = 15
Substitute for y:-
x - y = 30
x - 1<span>5</span> = 30
x ⇒ ?
Inverse operation:-
30 + 15 = x
30 + 15 = 45
x ⇒ 45
Check:-
x - y = 30
y ⇒ 15
x - 15 = 30
x ⇒ 45
45 - 15 = 30
Correct!
x ⇒ 45
Y= 15
x-y = 30
x-15= 30
x = 30+15
x = 45
Therefore, the value of x is 45
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