20% of 120 is 8 more than 4 / 5 of a number

20% of 120 is 8 more than 4 / 5 of a number

Let this number be X
(4 / 5 × x) + 8 = 120 × 20%
0.8x+8=24
0.8x=16
x=20

(- 5 and 1 / 2) △ 2 and 3 / 4 + 8 * 0.5 ^ 2 - (- 2) ^ 4 ^ (12-5 * 2 ^ 2)
Write about the process

(- 5 and 1 / 2) △ 2 and 3 / 4 + 8 * 0.5 ^ 2 - (- 2) ^ 4 ^ (12-5 * 2 ^ 2)
=-11/2÷11/4+8x0.25-16÷（12-5x4）
=-2+2-16÷（-8）
=0+2
=2
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8 times of a number minus the product of 4 and 12, the difference is equal to 0, find the number

Let this number be x8x-4 × 12 = 08x-48 + 48 = 0 + 48 & nbsp; & nbsp; 8x △ 8 = 48 △ 8 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 6 A: this number is 6