if |4x - y =1 |3x +2y = 20 then x – y is:A) - 5;b) 2;B) 7;D) 5. with explanation pls
Accepted Solution
A:
Answer:x = 2y = 7x - y = -5Step-by-step explanation:We have been two algebraic expressions which is given below:4x - y = 13x + 2y = 20 We have to find the value of x - y. so we need to find the value of x and y. 4x - y = 1 * 3 3x + 2y = 20 * 412x - 3y = 312x + 8y = 80 ---------------------11y = - 77y = 77/11y = 7Substitute the value of y in equation 1. 4x - y = 1 4x - 7 = 14x = 1 + 74x = 8 x = 8/4x = 2 x - y 2 - 7 = -5 Therefore, the required value of x, y , and x - y are 2,7 and -5 respectively.