Question

solve this question

Answer 1

Answer:

4+4 =8 3+3=9 please follow me and mark me as brainliest

Answer 2

Answer:

$\frac{21}{10} , \frac{59}{10} , 10, \frac{9}{10}$

Step-by-step explanation:

Have the four unknowns as x1, x2, x3, x4

form the equations

x1 + x2 = 8  --- (1)

x1 * x3 = 21 ---- (2)

x2 - x4 = 5 ---- (3)

x3 * x4 = 9 ----- (4)

dividing equation  $\frac{(2)}{(4)}$,

we get  $\frac{x1}{x4} = \frac{7}{3}$

or 3x1 = 7x4 ---- (5)

substitute equ (5) in (3),

7x2 - 3x1 = 35 --- (6)

use simultaneous equations to solve (6) and (1)

that gives x1 = $\frac{21}{10}$, x2 = $\frac{59}{10}$

substituting x1 and x2 in (2) and (3) we get

x3 = 10 and x4 = $\frac{9}{10}$