Question

Find the solution set of the system of linear equations and verify by graph.
2x + 5y = 20
6x - 5y = 12

Answer 1

Answer:

firstly solve one of the equation and fine the value x /y

• 2x+5y=20
• x=20-5y/2, / (means divided by whole equation except x)
• put the value of x into equation (2) which is 6x-5y=12
• 6(20-5y/2)-5y=12
• 60-15y-5y=12
• 60-20y=12
• y=12/5
• and then put the of y (12/5)in equation x=20-5y/2
• x=4