1. {2x−3y=9
{3x+5y=4
2. {(2x−3y=9)×5
{(3x+5y=4)x3
3. {10x-15y=45
{9x+15y=12
4. (10x-15y=45) + (9x+15y=12)= (19x=57)
5. (19x=57)÷19
6. x=3
7. 2(3)-3y=9
8. 6-3y=9
9. -3y=9-6
10. (-3y=3)÷(-3)
11. y=-1
Answer: x=3 and y=-1
Answer:
5:20pm
Step-by-step explanation:
120+100=320minutes
320/60=5hrs 20min
12+5:20= 17:20pm or 5:20pm
Step-by-step explanation:
i think it means that when negative tow crosses the equal sign, as in a calculation,it becomes positive
eg. -2 +z=0
z =2
(x,y)
x means how far right from the center the point is (if it is to the left, make it negative)
y means how far up from the center the point is (if it is down then make it negative)
answer is A