Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 Quantitative Aptitude Algebra Quadratic Equation
If the system of equations 2x + 3y = 7 and (a + b)x + (2a - b)y = 21 has infinitely many solutions, then
1
a = 1, b = 5
2
a = 5, b = 1
3
a = –1, b = 5
4
a = 5, b = –1