Y=x-2 and x+y=4 by substitution methood​

first of all,

y=x-2 (equation 1)

x+y=4 (equation 2)

put y= x-2 into x+y=4

Then,

x+(x-2) =4

x+x-2= 4

2x-2=4

2x= 4+2

2x= 6

divide both sides by the coefficient of x,

x=3

Then,

put x=3 in equation 1

y= 3-2

y=1

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)

answer:   rotate 270° clockwise about (7, 1) and reflect across the line x = 7

step-by-step explanation:

because i took test