help me
If you post a question i'll try
sum of two no is 54 and diffrence is 14 then find the no
x+y=54 x-y=14 or y-x=15? Treat is as a system
@lexiistarr
\[a+b=54 \] \[a-b= 14\]
@DAshingNii @Daezo
solve for a
a = 54
@julieishere21
okay, so you have to solve for a variable.
b = 14
sorry diffrence is 15 not 14
plug those into the two equations i gave you
\[54+15=?\] \[54-15=?\]
x+y=54 x-y=14 ------------- -1(x-y...14) = -x+y=-14 ----------------------- x+y=54 -x+y=-14 2y=40 y=20 --------------- x+y=54 x+(20)=54 x = 34 ----------------- (34,20) FIXED
If the difference is 15, do what I did, but change 14 to 15, and solve
54+15=69 54−15=39
hmmm dont you get a decimal
yeah I agree with @arilove1d I got a = 34.5 b = 19.5
yeah i got a = 34.5 b= 15
ans is 6 and 9
how ? @akshay1234
add 9 and 6 15 comes up and we multiplt these no 54 comes up
I'll explain how I got my answer: a + b = 54_____(1) a - b = 15 a = 15 + b_____(2) Substitute (2) into (1) 15 + b + b = 54 2b = 54 - 15 2b = 39 b = 19.5 Substitute b = 19.5 into both (1) and (2) a + b = 54 a - b = 15 a + 19.5 = 54 a - 19.5 = 15 a = 54 - 19.5 a = 15 + 19.5 a = 34.5 a = 34.5 And that is how I got a = 34.5 and b = 19.5
The question does not ask us to multipy anywhere @akshay1234
sorry my mistake but your ans is correct according to question
@DragonSage yours looks correct
thank you @arilove1d but can you explain how you got b = 15 please?
Sure !
I'm sorry i meant 19.5 i was looking at your question and absent mindlessly typed 15 instead of 19.5 .
oh thats okay then, I just wanted to make sure
Its good that you pointed that out
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