Solve the following simultaneous linear equations. Plz show the method. I will mark as brainliest
a) 20x+3y=7
b) 8x-15y=73
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BY SUBSTITUTE METHOD
20x+3y=7
x=7-3y/20. ———(1)
8x-15y=73————(2)
PUT EQUATION (1)in(2)equation
8(7-3y/20)-15y=73
14-6y/5-15y=73
14-6y-75y/5=73
14-81y=73*5
-81y=356-14
-y=351/81
y=-13/3
Now,put the value of y in equation (2)
x=7-3(-13/3)/20
x=3/10
20x+3y=7
x=7-3y/20. ———(1)
8x-15y=73————(2)
PUT EQUATION (1)in(2)equation
8(7-3y/20)-15y=73
14-6y/5-15y=73
14-6y-75y/5=73
14-81y=73*5
-81y=356-14
-y=351/81
y=-13/3
Now,put the value of y in equation (2)
x=7-3(-13/3)/20
x=3/10
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