Answer:
Step-by-step explanation:
Ax − By = C
add BY : Ax − By+BY = C +BY
Ax = C +BY
1) case : A = 0 : 0x = C +BY
*) C +BY = 0 all reals x are solution
**) C +BY≠ 0 no solutions reals
2) case : A ≠ 0 single solution : x = (C +BY)/A
Answer: X = C+BY / A
AX - BY = C
Add BY to bothside
AX - BY + BY = C + BY
AX = C + BY
Divide bothside by A
AX /A = C+BY / A
X = C + BY / A
