5 consective integers whose sum is 155

Step-by-step explanation:

If z is any integer then the consecutive numbers following z would be:

z+1, z+2, z+3, z+4

the sum is 155 so:

z + z+1 + z+2 + z+3 + z+4 = 155

5z + 10 = 155

5z = 145

z = 29

z+1 = 29+1 = 30

z+2 = 31

z+3 = 32

z+4 = 33

Check:

29+31+30+32+33 = 60+30+65 = 155

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18