Question

a)
x + y =(243-108)×3×3
x : y = 8
x , y = ?

b)
r : s = 7 rest 46
r + s = 950
r , s = ?

Answer 1

A) 
x + y =(243-108)×3×3
x : y = 8
x , y = ?

x+y=135x9
x+y=1215
x=8y

8y+y=1215
9y=1215
y=1215:9
y=135
x=8x135
x=1080

b)
r : s = 7 rest 46
r + s = 950
r , s = ?

r=7xs+46
r=7s+46

7s+46+s=950
8s=950-46
8s=904
s=904:8
s=113

r=7x113+46
r=791+46
r=837