Answer: x=7
Step-by-step explanation:
3x=21
21 divided by 3 is 7
so x equals 7
So x + y = 45, and 4x + 5y = 195. Get y by itself. Subtract x from both sides in the first equation to get y = 45 -x, and subtract 4x from the second equation to get 5y = 195 - 4x. Divide by 5 to both sides to get y = 39 - 4/5x. 39 - 4/5x = 45 - x. Add x to both sides to get 39 - 1/5x = 45. Subtract 39 from both sides to get -1/5x = 6. Divide by -1/5 to get x = -30, or 30. In the first equation, do 30 + y = 45. Subtract 30 from both sides to get y = 15. Check. 4(30) + 15(5) = 195, or 120 + 75 = 195.
Answer:
it depends which way youre going, but 4 and -4 work.
Step-by-step explanation:
If you were to find the constant rate, you would have to take 4.5 and divide it into 234 to get the answer
You would get 52 as the constant speed
The terms with the same variables is called like term