4 multiplyed by a number (Variable) plus 5 multiplyed by a number (V) equals 15
4v + 5v = 15
15/5 = v
15/4 = impossibility >_< Sorry :~)
v = ImPoSiBiLiTy
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3x + 5y = -1 2x - 5y = 16 Add the two equations: 5x = 15 or x = 3 Substitute for x in the first equation: 3*3 + 5y = -1 15 + 5y = -1 5y = -10 so y = -10/5 = -2 The solution is (x, y) = (3, -2)
Solving for y: 5y = 9 + 2y 5y - 2y = 9 3y = 9 y = 9/3 = 3
3x+5y=48 5y=48-3x-3x+5y=12 -3x+(48-3x)=12-6x=-36x=65y=48-3(6)5y=30y=6(6,6)
27 + y = 42 - 4y so 5y = 15 making y = 3 and x = 6
5x + 5y = 19x = 3.8 - yory = 3.8 - x