5t=v-u (Subtract u on both sides)
t=(v-u)/5 (Divide by 5 in both sides)
Answer:
21.b
22.c
Step-by-step explanation:
idk how to explain it lol I did mental math
The number in the blank box should be 44 because it said that "3 times x and 4 times y is 44".
You need to multiply the first equation by 3:
3x + 3y = 39.
Then, subtract the first equation from the second equation:
3x - 3x = 0
4y - 3y = y
44 - 39 = 5
Your new equation should look like this: y = 5
Now, substitute y = 5 into the first original equation:
x + 5 = 13
x = 8
Ans. (x, y) = (8, 5)
Step-by-step explanation:
8x-11=629
8x=629+11
8x=640
x=80
81.56+n-2.55=0
81.56+n=2.55
n=2.55-81.56
n=-79.01
