2a-5
2a+5
2
3+2*A+B*4/2-4 = 3 + 2A + 2B - 4 = 2A + 2B - 1
(-6) x (-3) = 18 (-10) x (-9) = 90 18 - 90 = -72
2a-5
2a -3 means 2 times a minus 3 if a = 2 we have 2 x 2 - 3 = 4 - 3 = 1
2a+5
2
3+2*A+B*4/2-4 = 3 + 2A + 2B - 4 = 2A + 2B - 1
Since the question is 3(2a), then just write it out. 3(2a) is 2a+2a+2a or 6a.
5a + 3 = 7a - 1 add 1 to both sides 5a + 4 = 7a so 4 = 2a as 5a + 2a = 7a 4 = 2a = 2 x 2 so a = 2 Check: then 5a + 3 = 10 + 3 = 13 and 7a - 1 = 14 - 1 = 13
(-6) x (-3) = 18 (-10) x (-9) = 90 18 - 90 = -72
x = 10 Minus 6 times 10 = minus 60 Add 3 to minus 60 = minus 57
3.27*10-3=.00327
4.5 x 10 - 3 = 42
9.9