Who can solve this correctly

Make I try


4+4= 8

4+9= 13
9-3= 6

Wrong. Try again

Slayer2:
Make I try


4+4= 8

4+9= 13
9-3= 6

If first row boxes are a and b respectively, and second row boxes x and y respectively. Then answer is

A= 3.5
B= 4.5
X= 9.5
Y= 3.5

Qed

Solving simultaneously, Let the Boxes be represented as W, X, Y and Z W + X = 8 .....(1) W + Y = 13.....(2) X +Z = 8.........(3) Y - Z = 6 .........(4) From Equation 1, W= 8 - X.....(5) Substitute the value of W in Equation 2 you have 8 - X + Y = 13.....(6) From Equation 3, X = 8 - Z....(7) Substitute the value of X in Equation 6 you have 8 - (8 - Z) + Y = 13 opening the bracket, you have 8 - 8 + Z + Y = 13 Which then gives Z + Y = 13....( From Equation 4, Y = 6 + Z .....(9) Substitute the value of Y in Equation 8 It becomes Z + 6 + Z = 13 Which turns into 2Z+ 6 = 13 2Z= 13-6 2Z= 7 Z= 7/2 Z= 3.5 Substitute the value of Z in Equation 9, You will get Y= 6+3.5 Y= 9.5 Substitute the value of Y in Equation 2 W + 9.5 = 13 W = 13 -9.5 W = 3.5 substitute the value of W in Equation 1 3.5 + X = 8 X = 8- 3.5 X = 4.5 Therefore; W = 3.5, X= 4.5, Y= 9.5 and Z = 3.5. Thank you and God bless