Answer:
Step-by-step explanation:
Identity property of multiplication: Any number times 1 (unity) is the number itself. 7 times 1 is 7, the number with which we started.
Answer:
Let x = the number of marbles Tim has
Let 2x = the number of marbles Sue has
x + 2x + 15 = 63
3x = 48
x = 16 marbles
Step-by-step explanation:
Answer:
x = 30
Step-by-step explanation:
The sum of the 3 interior angles of a triangle = 180°, hence
x + x + 10 + 3x + 20 = 180
5x + 30 = 180 ( subtract 30 from both sides )
5x = 150 ( divide both sides by 5 )
x = 30
subtract 1/3x
so that you can get qui equatio
