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Step-by-step explanation:
Answer:
hope this helps:) have a good day
Answer: Yes, if there is no number in front of a variable(or letter, as you said), it is actually 1.
a = 1a
x^2 = 1x^2
2m + n = 0 means 2m + 1n = 0
Step-by-step explanation:
First, yes, it is 20 - x = x + 16. Now here's the calculation to get x:
20 - x = x + 16 | + x
20 = x + 16 + x =
20 = 2*x + 16 | - 16
20 - 16 = 2*x =
4 = 2*x | / 2
4 / 2 = x =
2 = x
Jill has two marbles.
