Two factory plants are making TV panels. Yesterday, Plant A produced 3 times as many panels as Plant B. Five percent of the panels from Plant A and 4% of the panels from Plant B were defective. How many panels did Plant A produce, if the two plants together produced 1900 defective panels?

Question

Two factory plants are making TV panels. Yesterday, Plant A produced 3  times as many panels as Plant B. Five percent of the panels from Plant A and 4% of the panels from Plant B were defective. How many panels did Plant A produce, if the two plants together produced 1900 defective panels?

anonymous · Answer

I know its 3x(0.05) + X (0.04)

but this is where I get lost