Answer:
substitution
Step-by-step explanation:
Answer:
Put the equation into standard form
Ax+By=C
subtract 3x to the left
answer:
-3x+y=5
Ax+By=C
Step-by-step explanation:
Use simultaneous equations:
2x + 7 = x^2 + 8x - 9
7 = x^2 + 6x - 9
16 = x^2 + 6x
+ or - 4 = 7x
answer is
-4/7 or 4/7
Answer:
A number
Step-by-step explanation:
it cant be nothing