Let x = ten and y = 20 cent coins
x = y+12
.10x + .20y = 5.40
Substitute y+12 for x in the second equation and solve for y. Insert that value into the first equation to solve for x. Check by putting both values into the second equation.
Jun Wei 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.
5 answers
40
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I don't know why you people supposed to give wrong answers to confuse students
Don't do this
And
The answer is 40
Don't do this
And
The answer is 40