Question

AJUTOR!repede va rog

Answer 1

x+7/9 = 1 si 2/3
x + 7/9 = 5/3
x = 5/3 - 7/9 = 15/9 - 7/9
x = 8/9

x - 5/8 = 3/4
x = 3/4 + 5/8
x = 6/8 + 5/8
x = 11/8

7/24 : x = 7/8
x = 7/24 : 7/8
x = 7/24 x 8/7
x = 1/3

a-b = 28
b = 3/10 * a
a - 3/10 * a = 28
a(1 - 3/10) = 28
a(10/10-3/10) = 28
a*7/10 = 28
a = 28:7/10 = 28x10/7
a = 40
b = 40x3/10 = 12

x+2/3 = 5/2
x = 5/2 - 2/3
x = 15/6 - 4/6 
x = 11/6