L Find the value of the expression given the value of the variables. 1. 3x + 5, if x = 4
3 6a - b, if a=3
4.9x - 2y, if x = 4 and y = 8
2. 2.b. if a= 4, b=2
3 6a - b, if a=3
4.9x - 2y, if x = 4 and y = 8
2. 2.b. if a= 4, b=2
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