Question

80 is 32% of a certain number, find the number.
Subtract 12x + 3y - 3 from the sum of 7x+4y - 5z + 5 and 6x - 72-8​

Answer 1

Answer:

(i) 250

(ii) x + y - 5z - 72

Step-by-step explanation:

(i) Let x be the required number

∴ 32x/100 = 80

x = 80 × 100/32

= 250

(ii) sum of 7x+4y - 5z + 5 and 6x - 72-8​=

6x - 72-8​= 6x-80

Adding 7x+4y - 5z + 5 to  it will give us

Sum = 13x + 4y - 5z -75

Subtracting 12x + 3y - 3 from it, we get

x + y - 5z - 72