30
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Substitute the values for the letters:
a = 24
b = -6
a - b = 24 - (-6)
= 24 + 6
= 30
Subtracting a negative number is the same as adding the positive (absolute) value of the negative number; subtracting -6 is the same as adding 6, subtracting -5 is the same as adding 5, etc.
24 / 6 = 4
If a = 26 and b = 6 then a - b = 20.
If a + b = 6, what is the value of 3a + 3b?
6b = 144 Therefore, b = 144/6 Therefore, b = 24
2 X 6 = 12