A=5How to do it:30=6aa=6/6 (Do on both sides) 30/6a=(6/6 cancels out) 30/6a=5
(3,3)
It does not help you.
45 = 30 + m Subtract 30 from both sides: 15 = m
11a+9 = 4a+30 11a-4a = 30-9 7a = 21 Solution: a = 3
v is -15... -15*2 = -30... -30+11= -19.
x = 6 and y = -2
x+30 = 3x-50 x-3x = -50-30 -2x = -80 x = 40
8x+30=4x+18 -4x -4x 4x+30=18 -30 -30 4x=-12 4x/4=-12/4 x=-3
90+x+72+30 = 180. If you add 90+72+30, you get 192. But to get 180 you have to subtract 12. 90+(-12)+72+30 =180 if x is -12
x2 + 13x = -30 ∴ x2 + 13x + 30 = 0 ∴ (x + 3)(x + 10) = 0 ∴ x ∈ {-3, -10}
30 + 30 + 30 + 30 + 30 + 30 = 180