2006-07-18 09:01:42 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
-7t + 4t = -3t
2006-07-18 09:05:10 · answer #1 · answered by jq 2 · 0⤊ 0⤋
The KEY here is that you're only dealing with 1 variable, T.
Think about it. If you have 4 T's (4T) and you take away 7 T's (-7T), how many T's would you have left? You'd have -3 T's, which mathematically would be written as -3T.
2006-07-19 03:36:44 · answer #2 · answered by msoexpert 6 · 0⤊ 0⤋
this is easy because both numbers have the same letter so we know that if we add a negative number with a positive number the result will have the sign of the greatest number in this case 7 that's why -7t+4t = -3t
2006-07-18 16:11:08 · answer #3 · answered by Erika 2 · 0⤊ 0⤋
-3t.
Think of the variable as something tangible, with positives the amount you have and negatives the amount you owe.
-7t + 4t could be thought of as owing 7 dollars and having 4 dollars. The net result (after you pay what you owe) is that you still owe 3 dollars.
-7t + 4t = -3t.
2006-07-18 16:08:13 · answer #4 · answered by Louise 5 · 0⤊ 0⤋
do u mean - 70 + 40 ? if so so it = -30
if not thus its - 3t ( if t is as y or x)
2006-07-18 16:11:04 · answer #5 · answered by yummy yummy 2 · 0⤊ 0⤋
-3t
2006-07-18 16:26:06 · answer #6 · answered by Anonymous · 0⤊ 0⤋
-3t
2006-07-18 16:10:29 · answer #7 · answered by PumaPepper 2 · 0⤊ 0⤋
-3t
2006-07-18 16:04:51 · answer #8 · answered by mister_m_dude 2 · 0⤊ 0⤋
-3t
2006-07-18 16:03:57 · answer #9 · answered by cw 3 · 0⤊ 0⤋