EVERYDAY SCIENCE

Detailed explanation-1: -Answer: Model the second expression using 6 positive x tiles, 4 negative tiles, and then one negative x tile. The negative x tile forms a zero pair with one of the positive x tiles, leaving 5 positive x tiles and 4 negative tiles. This is not equivalent to 7x – 4.

Detailed explanation-2: -Equivalent fractions are the fractions that have different numerators and denominators but are equal to the same value. For example, 2/4 and 3/6 are equivalent fractions, because they both are equal to the ½. A fraction is a part of a whole.

Detailed explanation-3: -x + 2 = 7. x + 2-2 = 7-2 (subtracting both sides by same number) x = 5. 03-Oct-2019