Question

Mateee!!! Heeelp!!!!!!!!!!!!!

Answer 1

a: (a-b) = 4 rest 7
a = 4 × (a-b) + 7
a= 4a - 4b + 7
4a-4b+7-a=0
3a+7=4b
a=4b-7/3

4b-7/3+b = 245
7b-7/3= 245
7(b-1) = 245×3=735
b-1 = 735:7
b-1= 105
b=105+1
b=106

a+b = 245 => a=245-
a=245-106
a=139

Sper ca te'am ajutat. Succes!

Answer 2

X + Y = 245 ==> X = 245-Y
X : (X-Y) = 4 rest 7
X = 4×(X-Y)+7
X = 4X-4Y+7
4Y = 4X-X+7
4Y = 3X+7

inlocuim pe X cu 245-Y
4Y = 3(245-Y) + 7
4Y = 735-3Y+7
4Y+3Y = 742
7Y = 742
Y = 742:7
Y = 106

X = 245-106
X = 139


X = 139
Y = 106

Verificare:
139+106 = 245