Question

{8a+9b=36
{a-16b=210

Answer 1

{8a+9b=36
{a-16b=210
------------------------
9a-7b=246

9a=246+7b
a=246/9 +7/9 *b

-7b=246-9a
b= - 246/7 +9/7 * a
b= -246/7 + 9/7 * ( 246/9 + 7/9 * b)
b= -246/7 + 246/7 + b
b-b=0
0=0

a= 246/9 + 7/9 * 0
a=246/9=27 i 1/3
dwadzieścia siedem i jedna trzecia :)
b= -246/7 + 9/7 * 246/9
b=-246/7 + 246/7=0

odp : a= 27 i 1/3
b=0