Find the value of a and b for the pair of linear equations have infinite solutions.
Line 1: 9x + (a + b)y + 21 = 0
Line 2: 27x + 36y + (a - b) = 0
1
a = 30.5, b = -32.5
2
a = 37.5, b = -25.5
3
a = 27.5, b = -25.5
4
a = 47.5, b = -25.5
Find the value of a and b for the pair of linear equations have infinite solutions.
Line 1: 9x + (a + b)y + 21 = 0
Line 2: 27x + 36y + (a - b) = 0