Question

2x+7y=-5. 3x-7y=10ответьте пж очень срочно.

Answer 1

x=1

y=-1

это вроде весь ответ

Answer 2

Sure, I can help you solve the system of equations. To find the values of x and y, we can use either the substitution method or the elimination method. Let's use the elimination method:

Step 1: Add the two equations to eliminate the y terms.

(2x + 7y) + (3x - 7y) = (-5) + 10

Simplify:

5x = 5

Step 2: Now, solve for x by dividing both sides by 5:

x = 5/5

x = 1

Step 3: Substitute the value of x back into either of the original equations to find the value of y. Let's use the first equation:

2x + 7y = -5

2(1) + 7y = -5

2 + 7y = -5

Step 4: Now, isolate y by subtracting 2 from both sides:

7y = -5 - 2

7y = -7

Step 5: Finally, solve for y by dividing both sides by 7:

y = -7/7

y = -1

So, the solution to the system of equations is x = 1 and y = -1.