Question

Can i get some help on this question pleae

Answer 1

Explanation:

For the first one, its 7.5, because...

2x - 5 = 10

if we take x being 7.5, (and multiply the two and 7.5)

2(7.5) - 5 = ? (lets assume we dont know the answer yet, we want to find 10 though)

15 - 5 = 10 :)

For the second,

Its the transitive property, cause theres lots of stuff being changed.

An official definition is: The transitive property of equality formula is given as follows: If x = y and y = z, then x = z. Where x, y and z belongs to the same category elements. For example, if “x” represents the measurement of a line segment, then y and z should represent the measurement of the line segment.

Hope i helped!

Answer 2

Explanation:

2x-5 = 10

to solve for 2x just add five on both sides

2x=15

10x + 6y = 14

x = 2y

substitute 2y in for x

10(2y) + 6y =14

transitive property

" The transitive property of equality formula is given as follows: If x = y and y = z, then x = z. Where x, y and z belongs to the same category elements. For example, if “x” represents the measurement of a line segment, then y and z should represent the measurement of the line segment. "