Question

Solve the following system by the substitution method. Check the solution.
3x+5y=47
x=y+5

Answer 1

hello :
3x+5y=47   ....(1)
x=y+5   ....(2)
subst in (1) :
3(y+5) +5y =47
3y+15+5y = 47
8y = 32
y =4 
by (2) : x =4+5 = 9 
one solution : (9 , 4)