Question

Stiind ca 8 *a+6 *b=86 si 8*a+10*B=106 ,afla a si b

Answer 1

8a+6b=86
8a=86-6b
8a+10b=106
86-6b+10b=106
4b=106-86
4b=20
B=20:4
B=5
8a=86-6x5
8a=86-30
A=562:8
A=7
Verificare 8x7+6x5=86
56+30=86
86=86

8x7+10x5=106
56+50=106
106=106

Answer 2

8xa+  6xb=  86
8xa+10xb=106
a=?
b=?
scadem cele 2 relatii:

8xa-8xa + 10xb-6xb=106-86
4xb=20
b=20:4
b=5

8xa+  6xb=  86, inlocuim pe b
8xa+6x5=86
8xa+30=86
8xa=56
a=56:8
a=7