One alloy is 2 parts iron to 3 parts silver and another alloy is 7 parts iron to 3 parts silver. how much of each should be combined to produce a 30 pound alloy that is 1 part iron to 1 part silver?

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?