Question

number is equal to 7 times itself minus 18. Which is the number?​

Answer 1

Answer:

3

Step-by-step explanation:

let the no. be x

x= 7x - 18

x + 18= 7x

18 = 7x - x

18 = 6x

18/6 = x

3 = x

Answer 2

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Let the number be ‘p’

Thus the equation becomes;

7p - 18 = p

→ 7p = p + 18

• transpose 18 to rhs and change the sign

→ 7p - p = 18

• transpose p to lhs and change the sign

→ 6p = 18

→ p = 18 ÷ 6

• transpose 6 to rhs and change the sign

→ p = 3

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