2007-12-19 14:46:10 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Let B catch x fish
A catches 4x fish
4x + x = 75
5x = 75
x = 15
A catches 60 fish
B catches 15 fish
2007-12-19 22:39:37 · answer #1 · answered by Como 7 · 4⤊ 2⤋
15
2007-12-19 22:55:17 · answer #2 · answered by The King 3 · 0⤊ 1⤋
Let a represent the number of fish A caught and b represent the number of fish b caught.
Their total, a + b = 75
And you know that a = 4b
Just substitute a = 4b into the original equation, so that you have:
4b + b = 75 And solve
5b = 75
b = 15
B caught 15 fish.
2007-12-19 22:51:14 · answer #3 · answered by Sowmya 3 · 0⤊ 2⤋
A + B = 75 eq1
A = 4B eq2
so Substitute 4B to eq1 since A =4B
4B + B = 75
5B = 75
B = 15
therefore, B caught 15 fishes
2007-12-19 22:57:30 · answer #4 · answered by Danny T 1 · 0⤊ 1⤋
There are 5 parts. A has 4 parts. B has 1 part. 75 divided by 5 is 15.
Sorry thumbs downer. You don't need NASA equations to figure out simple math problems like this one.
Just like an equation "What's 45 + 97?" it's easiest to add 100 and subtract 3 than to add 97.
2007-12-19 22:54:45 · answer #5 · answered by Love #me#, Hate #me# 6 · 0⤊ 1⤋
a + b = 75
a = 4b
4b +b = 75
5b = 75
b = 15
a = 4(15)
a = 60
b caught 15 fish
2007-12-19 22:50:48 · answer #6 · answered by Ms. Exxclusive 5 · 0⤊ 1⤋
15
A + B=75
A = 4 B
so sub. 4B + B =75,5B=75,
B=15
A =60
60+15=75 checked.
2007-12-19 22:50:54 · answer #7 · answered by chanljkk 7 · 0⤊ 2⤋