a = 3a + 4 0 = 2a + 4 2a = -4 a = -2
2a + 2b = 160 But b = a + 40 so 2a + 2(a + 40) = 160 ie 2a + 2a + 80 = 160 or 4a = 80 ie a = 20 Then b = a + 40 gives b = 20 + 40 = 60 Solution: a = 20, b = 60
A equals 20.
2a + 3a + 4 = 5a + 4
2a + 9 = 4a - 19 9 + 19 = 4a - 2a 28 = 2a a = 14
a + a + a - 2a = 3a - 2a = a
a = 3a + 4 0 = 2a + 4 2a = -4 a = -2
What is the solution of -2a plus 3a plus 5b
2a+5a+9a = 16a
2a + 2b = 160 But b = a + 40 so 2a + 2(a + 40) = 160 ie 2a + 2a + 80 = 160 or 4a = 80 ie a = 20 Then b = a + 40 gives b = 20 + 40 = 60 Solution: a = 20, b = 60
A equals 20.
a= (+a) or a= (-) b= 2a b= 2a c= (-a) c= (+a)
2a + 3a + 4 = 5a + 4
1
A=2
a = 1
2a+54=38 2a=38-54 2a=-16 a=-16/2 a=-8