Question

solve,u+6.5a=20 and u+23.5a=24

Answer 1

Step-by-step explanation:

u+6.5a = 20 ---------- 2u+13a = 40 ------(1)

u+23.5a=24 ---------- 2u+47a = 48 ------(2)

(1)-(2)

-34a = -8

a = 8/34 = 4/17

substitute a=4/17 in equation (1)

(1)------ 2u+13(4/17) = 40

2u+52/17=40

(34u+52)/17=40

34u+52=40×17

34u+52=680

34u=680-52

34u=628

u=628/34

u=314/17

therefore u=314/17 , a=4/17