Question 900883
0.03*x+0.07*50=0.05(50+x)
0.03*x+3.5=2.5+0.05x
0.03x-0.05x=2.5-3.5
-0.02x=-1
x=50
check
0.03*50+0.07*50=0.05(50+50)
1.5+3.5=0.05(100)
5=5
ok