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Solve one of the formulas for A, then substitute that into the other formula to solve for B, then substitute the solution for B into one of the formulas to solve for A.
Here is how:
Givens:
A+B=8
A-B=9
So:
If A+B=8 then A=8-B
Next, substitute this into the other formula...
A-B=9
(8-B)-B=9
(-B) - B = 1
(-2B) = 1
B= (- 1/2)
Next, substitute the solution for B into one of the formulas to solve for A....
A+B=8
A+ (-1/2) = 8
A = 8 and 1/2
So...
B= (- 1/2)
A = 8 and 1/2
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What is the value of x plus 4 equals 9?
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What is 9 plus 5-1?
13...... 9 plus 5 equals 14...... 14 minus 1 equals 13
What is minus 9 times minus 8 plus minus sixteen?
(-9 x -8) + (-16) = (72) -16 = 56
What is the answer to Sunshine Math 6 - Uranus V - question 1?
5
What does 9 minus negative 3 minus 8 equals?
9 - -3 = 9 + 3 = 12 12 - 8 = 4 9 - -3 - 8 = 4
Two plus seven plus nine minus eight equals?
Your stupid... 2+7-9-8=-8 The 2+7 cancel out the -9, so the answer is -8.
What is the value of x plus 4 equals 9?
5. Just do 9 minus 4. 5 plus 4 equals 9
Calculate the following 7 - -2 equals?
A minus and a minus makes a plus A plus and a plus makes a plus A minus and a plus or plus and a minus makes a minus 7 - -2 is a minus and a minus Therefore the answer is 7 + 2 = 9
What is 9 plus 5-1?
13...... 9 plus 5 equals 14...... 14 minus 1 equals 13
What is minus 9 times minus 8 plus minus sixteen?
(-9 x -8) + (-16) = (72) -16 = 56
What is the answer to Sunshine Math 6 - Uranus V - question 1?
5
What does 9 minus negative 3 minus 8 equals?
9 - -3 = 9 + 3 = 12 12 - 8 = 4 9 - -3 - 8 = 4
What is 8M minus 4M minus 6 minus 3 plus 5M equals 8 squared minus 1?
8M - 4M - 6 - 3 + 5M = 82 - 1 9M - 9 = 64 - 1 9M - 9 = 63 9M - 9 +9 = 63 + 9 9M = 72 9M/9 = 72/9 M = 8
What is 9 minus 8 plus 8 times 5 minus 9?
Applying the laws of BODMAS, 9 - 8 + (8 x 5) - 9 = 32
What is 3 plus 2 plus 8 minus 9 minus 5?
Negative one.
Are 4 plus 5 equals 9 and 9 minus 2 equals 7 related facts?
no it isnt
9 plus 8 plus 1 equals 9 plus 1 plus 8?
true
