Question

Решите уравнение:(3/4х - 2/3)*15=8
А)2.4
В)1.6
С)5 1/3
D) 1 1/7

Answer 1

3/4x-2/3=8/15
3/4x=8/15+2/3=8/15+10/15=18/15
x=18/15:3/4=18/15*4/3=8/5=1,6

Answer 2

($frac{3}{4}$х - $frac{2}{3}$) * 15= 8
$frac{3}{4}$х * 15 - $frac{2}{3}$ * 15 = 8
$frac{45}{4}$ x - 10 = 8
$frac{45}{4}$ x = 10 + 8
$frac{45}{4}$ x = 18
x = 18 / $frac{45}{4}$ 
x = $frac{8}{5} = 1,6$