Five times the sum of a number and 10. Subtract 20 to get 100

Five times the sum of a number and 10. Subtract 20 to get 100

Number x
5（x+10）-20=100
5x+50-20=100
5x=70
x=14

A number, minus 20% of it, plus 5, is still smaller than the original 3. So, what is the number______ ．

(5 + 3) △ 20%, = 8 △ 0.2, = 40. Answer: this number is 40. So the answer is: 40

5 times of a number plus 2 / 3 of 30, and the sum is 100, find this number? (use equation solution)

Let this number be X
5x+30*2/3=100
5x+20=100
5x=80
x=16

For the fifth grade under 100 simple calculation of 100 equations, 100 application problems! Too late!
People's Education Press

Simple calculation of (26-14) × 8 50 × (2 + 80) (10 × 12) × 63 (27-23) × 12 (38-16) × 24 (24 + 38) × 6 (87-42) × 15 (84-15 × 3) 16 × (49-28) 45 × (84