Pls help, Thx! Solve using the substitution method.
y = 2x - 4
6x - 3y = 12

Which equation can be used to solve for the unknown number? seven less than a number is thirteen. n-7=13 7-n=13 n+7=13 n+13=7

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers