Using the substitution method, Zack is solving the following system of equations algebraically:
y + 3x = -4
2x – 3y=-21
Which equivalent equation could Zack use?
1) 2(–3x – 4) + 3x =-21
3) 2x – 3(–3x – 4)=-21
2) 2(3x – 4) + 3x = -21
4) 2x – 3(3x – 4) = -21

What is the measure of angle tvu shown in the diagram below

If x+y+z=0 what is the value of [tex] {x}^{3} + {y}^{3} + {z}^{3} [/tex]

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?