Question

Linear equation for : 5 subtracted from twice a number is 7
A - 2x - 7 =5
B= 2x - 5=7
C- x=6
D - 5 - 2 x = 7
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Answer 1

Answer:

(i) Let the required number be x.

So, five times the number will be 5x.

∴ 5x = 40

(ii) Let the required number be x.

So, when it is increased by 8, we get x + 8.

∴ x + 8 = 15

(iii) Let the required number be x.

So, when 25 exceeds the number, we get 25 - x.

∴ 25 - x = 7

(iv) Let the required number be x.

So, when the number exceeds 5, we get x - 5.

∴ x - 5 = 3