Ill mark as branerlist
which equation best represents this situation?

the number 63 increased by an unknown number is equal to 105.

a 63s = 105

b 63−s=105

c 63÷s=105

d 63 + s = 105

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?