Wiki User
∙ 13y agoThe answer is 10!!!
Above is wrongTo work it backwards.(A - 13) X 8 = 80
80 Divided by 8 = 10
10 + 13 = 23
A = 23
To check put the answer into the original equation
Wiki User
∙ 13y ago80
Subtract two, multiply by two, subtract one. :)
x - 8 = -13 To solve the equation, you can add, subtract, multiply and/or divide as long as you do the same thing to both sides of the equation. In this case, you can add 8 to both sides making it x - 8 + 8 = -13 + 8 x = -5
Multiply the number by .8 to get 80% of that number.
1/8 + 3/13To find a common denominator, multiply 8 and 13, which is 104.Multiply the 1/8 by 13/13, which is 13/104.Multiply 3/13 by 8/8, which is 24/104.Now that they have a common denominator, you can add them:13/104 + 24/104 = 37/104.
80
Subtract two, multiply by two, subtract one. :)
21
8
x - 8 = -13 To solve the equation, you can add, subtract, multiply and/or divide as long as you do the same thing to both sides of the equation. In this case, you can add 8 to both sides making it x - 8 + 8 = -13 + 8 x = -5
you would need a 94. Multiply your current average of 78 times 7 to get to 546. To have an average of 80, you multiply 80 *8 to get 640. 8 represents the total number of exams you have taken. I am assuming the question is "what does the student need to score on his eighth exam to get an 80 for the semester?" subtract 546 from 640 and you get 94.
y/2 + 8 = 13 Subtract 8 from both sides: y/2 = 5 Multiply both sides by 5: y = 10
Multiply the number by .8 to get 80% of that number.
1/8 + 3/13To find a common denominator, multiply 8 and 13, which is 104.Multiply the 1/8 by 13/13, which is 13/104.Multiply 3/13 by 8/8, which is 24/104.Now that they have a common denominator, you can add them:13/104 + 24/104 = 37/104.
First, you have to find a least common denominator by multiplying the two denominators together. So, 8 times 10=80. So, both of the denominators would have to be 80. To get 80 on the bottom of a denominator, you have to multiply 9 tenths by 8 on the top and the bottome and you have to multiply three eighths by 10 on both top and bottom. After that, you should get 72 over 80 minus 30 over 80. Then subtract ONLY the numerators, the denominatos stay the same when you subtract fractions. So, 72-30=42. So, your final answer would be 42 over 80, which reduces to 21 over 40, and that's your final answer.
3 6 4 8 6 12 10 20 18 36 34 68 Multiply 3 by 2 to get 6 Subtract 2 to get 4 Multiply 4 by 2 to get 8 Subtract 2 to get 6 Multiply 6 by 2 to get 12 Subtract 2 to get 10 .... Got it?
5