Lodi solved the equation 3+x/2=10 and justified each step as shown. identify lodis error and fix his mistake. remember the justification is lodis work as well

It appears that he made a mistake in his justification.

Remember that the Multiple Property of Equality says that we can multiply both sides of an equation by an expression, or the following:

The Subtraction Property of Equality similarily says that we can subtract some expression from both sides of the equation, or the following:

Thus, it would be right for the Subtraction Property of Equality to justify the second step, as this is the step where we subtract something from both sides of the equation, which is 3. Similarly, we should justify the third step with the Multiplication Property of Equality, since this is the step where we multiply both sides of the equation by 2.

Thus, his mistake is that his justifications for steps 2 and 3 are switched around.

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step-by-step explanation:

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!