25 times a letter Y = a number 5
Answer:
x = 9
Step-by-step explanation:
AB = 4x + 6 and BC = 7x + 15 AC is the sum of AB and BC
so 4x + 6 + 7x + 15 = 120 add like terms
11x + 21 = 120 subtract 21 from both sides
11x = 99 divide both sides by 11
x = 9
The correct answer is: D) Subtracted like terms incorrectly
Step-by-step explanation:
Given

The terms 11.2y-7.4y need to be subtracted. But option b is to add them. We will add them and then solve the equation to see if its right.
So adding 11.2y-7.4y

Dividing both sides by 18.6

so by adding the terms instead of subtracting we get y=7.6.
this means that the error was adding 7.4y-11.2y instead of subtracting
The correct method will be:

Dividing both sides by 3.8

Hence,
The correct answer is: D) Subtracted like terms incorrectly
Keywords: Linear equation, Expression
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