For the following system if you isolated x in the second equation to use the substitution method what expression would you substitute into the first equation?
2x+y= 8
-х – зу = -12

a. зу + 12
b.-3y + 12
c. зу – 12
d.-3y - 12

it's both, now can you answer my most recent question?

15 batches are the most you can make

step-by-step explanation:

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

answer is 33

step-by-step explanation: