Can someone help me with this please

Igor stravinsky tires sells approximately 3,760,000 car tires and 1,200,000 truck tires each year. about 47,000,000 care tires and 26,000,00 truck tires are sold each year in the united states. what is stravinsky's market share in each of these two markets (cars and trucks)?

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab