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elena55
2 months ago
14

Solve 9x-y=45, solve for y

Mathematics
2 answers:
babunello [11.8K]2 months ago
5 0
Start with 9x - y = 45. Subtract 9x from both sides to get -y = -9x + 45. Next, multiply both sides by -1 to make y positive, resulting in y = 9x - 45.
lawyer [12.5K]2 months ago
3 0
Answer: y = 9x - 45.
_________________________
Explanation:
_________________________
Given the equation 9x - y = 45;

Method 1)
____________________________________________
Multiply both sides of the equation by -1:

-1 × (9x - y = 45);

which gives: -9x + y = -45;

this can be rewritten as y - 9x = -45;

add 9x to both sides to isolate y:

y - 9x + 9x = -45 + 9x;

so y = -45 + 9x;

or equivalently, y = 9x - 45.
__________________________________________________
Method 2)
__________________________________________________
Starting with 9x - y = 45;

add y to both sides and subtract 45 from both sides:

9x - y + y - 45 = 45 + y - 45;

simplifies to 9x - 45 = y;

thus, y = 9x - 45.
________________________________
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