Write an expression that you can substitute for x in the top equation of the system below to solve the system by substitution. 5x - 2y = 8 x - y = 1

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

its line 2 i just added the rest or else it wouldn't let me answer

ur right ive taken the test

step-by-step explanation: