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How do i solve this?

can it not also be y ?

Its because i am learning graphing at the moment so i thought there would be y in there

Does the question have the word sketch/draw or graphically in it?

no

sorry

Write 5% as a decimal.

Also write 7.2% as a decimal.

0.05

0.072

Sorry I meant fraction. My apologies.

50/1000
75/1000

1/20 and 3/40

75?

The question says 7.2%....not 7.5%....

9/125

You only got one correct. Please rewrite 7.2% as a fraction again please.

Yep you're correct.

Sorry about that, my comp lagged out.

Okay now.
Do you agree that (x times 5%)+[(5000-x) times 7.2%)]=349?

yes

Okay, now change the 5% and 7.2% into the fractions you wrote previously and show me your equation.

1/20 x + 9/25 (5000-x) = 349

Yep great! Excellent.

oh... yea

It's 125.

yea

500 LCD

yep.

Multiply by 500 to both sides.

Tell me what you get. Afterwards, you would have to expand/distribute the brackets/paranthesis.

i ment 0.072

Yea of course.

I just reckon fractions are clearer and you would understand a bit better.

So what did you get?

I find fractions a bit difficult so i did decimals,
0.05x + 0.072(5000-x) = 349

0.05x + 360-0.072x = 349

Okay...Well then expand/distribute the brackets/paranthesis...

and 0.05x - 0.072 = -11

Where's the x gone mate?

sry (you are am amazing teacher you can catch the slighest mistakes =)
0.05x - 0.072x = -11

Okay collect likes terms. That means group the x's together.

like terms*

-0.022x = -11

x= -11/-0.022

x = 500

wow

Yep and then what do you get for the other one.

?*

There's two parts.

That's the first part where it was invested at a rate of 5% p.a

So what about the part where it was invested at a rate of 7.2%?

4500 the rest of the money

Correct. Awesome.

wow, you are just an amazing teacher. thank you soo much

And no worries. Good work.

Mr, Aztech are you usually available at this time so I can ask you for help

Thankyou sir