1. x=2, y=3
2. n=7, m=-6.8
3. x=6, y=3
4. q=-2, p=-1
5. c=2, d=0
Step-by-step explanation:
4x + 3y = 17
5x β 3y = 1
first make it so either x or y can cancel out in both equations, then combine the equations, giving you 9x=18. solve for x, x=2. substitute 2 for x in either equation, 4(2) + 3y = 17. solve for y, 8+3y=17, 3y=9, y=3
β5m + 6n = β8
β5m + 8n = 6
first make it so either m or n can cancel out in both equations, multiply β5m + 6n = β8 by -1, 5m - 6n = 8, then combine the equations, giving you 2n=14. solve for n, n=7. substitute 7 for n in either equation, 5m - 6(7) = 8. solve for m, 5m - 42 = 8, 5m = -34, m = -6.8
2x β 7y = β9
6x + 7y = 57
first make it so either x or y can cancel out in both equations, then combine the equations, giving you 8x=48. solve for x, x=6. substitute 6 for x in either equation, 2(6) β 7y = β9. solve for y, 12 β 7y = β9, β7y = β21, y = 3
5p β 4q = 3
β5p β 4q = 13
first make it so either p or q can cancel out in both equations, then combine the equations, giving you -8q=16. solve for q, q=-2. substitute -2 for q in either equation, 5p β 4(-2) = 3. solve for p, 5p + 8 = 3, 5p = -5, p = -1
6c + d = 12
c β d = 2
first make it so either c or d can cancel out in both equations, then combine the equations, giving you 7c=14. solve for c, c=2. substitute 2 for c in either equation, 6(2) + d = 12. solve for d, 12 + d = 12, d = 0
[EDIT] question 2 is impossible.
Step-by-step explanation:
QuestionNow you can write the 1st equation like this.
Now simply Solve the 3rd equation
Now replace y as 2 in the 2nd equation like this
Now let's check whether the answer correct or wrong
Yes, the answer is correct
hope this helps you !!