I am a parent of a 10 year old, 5th grader and my hubby and I just can't figure these out to help her. Anyone?? Thanks in advance.
27 = 8k divide k = ??
5a - 3a = 18 a = ??
12r - 4r = 48 r = ??
g = 7(10-3) g = ??
These are finding the unknown number in each equation.
Thanks so much
27 = 8k
Divide both sides of the equation by 8.
27/8 = k
3.375 = k
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5a - 3a = 18
2a = 18
a = 9
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Can you do the rest yourself? We'll be glad to check your answers.
12r-4r=48r=
5a-3a=18. What does a equal?
To find the unknown number in each equation, you have to isolate the variable on one side of the equation. Let's go through each equation step by step.
1. 27 = 8k, divide k = ??
To solve for k, you need to get k by itself on one side of the equation. In this case, you can do that by dividing both sides of the equation by 8.
Dividing both sides by 8 gives you:
27/8 = k
So, k = 27/8.
2. 5a - 3a = 18, a = ??
To solve for a, you need to combine the like terms on the left side of the equation first. In this case, you can subtract the coefficients of the a terms:
5a - 3a = 18
(5 - 3)a = 18
2a = 18
Next, divide both sides of the equation by the coefficient of a, which is 2:
2a/2 = 18/2
a = 9
So, a = 9.
3. 12r - 4r = 48, r = ??
To solve for r, you need to combine the like terms on the left side of the equation first:
12r - 4r = 48
(12 - 4)r = 48
8r = 48
Next, divide both sides of the equation by the coefficient of r, which is 8:
8r/8 = 48/8
r = 6
So, r = 6.
4. g = 7(10-3), g = ??
To solve for g, you need to simplify the expression on the right side of the equation first by performing the operations inside the parentheses:
g = 7(10-3)
g = 7(7)
g = 49
So, g = 49.
I hope this helps! Let me know if you have any more questions.