other govt exam BARC DAE Junior Purchase Assistant / Junior Storekeeper Mock Test Quantitative Aptitude Algebra Polynomials
If 2x - y = 4 and (a + b)x - (a + b - 4)y = 2(a + b) are respectively a pair of coincident line, then which of the following option is true?
1
a + b = 0
2
a + b = 5
3
a + b = 8
4
a + b = 10