Question

When a number multiply by 3 increased by 20 find the number

Answer 1

Let no be X
X*3=X+20
3X-X=20
2X=20
X=10

therefore the number is 10

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Answer 2

Let the number be x

A number multiplied by 3 = 3 × x = 3x

After a number multiplied by 3 is increased by 20 = x + 20


According to the question,

3x = x + 20

➾ 3x - x = 20

➾ 2x = 20

➾ x = 10


∴ The number is $\green{\boxed{\green{\boxed{\red{\textsf{10}}}}}}$



Let's check the solution :-

3x = x + 20

By putting the value of x :

➾ 3 × 10 = 10 + 20

➾ 30 = 30

∴ LHS = RHS ✔