11. Albert has 12 more 10 cent coins than 20-cent coins. The total value of all his coins is $5.40. Find
the total number of coins he has.

Step-by-step explanation:

Let x be the number of 10 cent coins

Let y be the number of 20 cent coins

given

as equation 1

and

as equation 2.

Now we will use elimination method to solve simultaneous equations.

Now we multiply equation 1 by 0.2 to eliminate y and solve for x first.

Let this new equation be equation 3.

Now use equation 2 + equation 3.

Substitute x into equation 1,

Therefore total number of coins = x + y = 26 + 14 = 40

in total he has 62 cents

Step-by-step explanation:

I hope it's the correct answer if I'm wrong tell me right away.

step-by-step explanation:

if you meant, "on the way from (3, 2) to (3, 14):

x does not change; y increases by 12.

ensure that you have copied down this problem correctly.   .

41*67/2=1373.5

step-by-step explanation:

i just used a calculator