1 x = 4
5(4) + 3(8 - 2(4)) = 15 - (4 - 9)
20 + 3(8 - 8) = 15 - (4 - 9)
20 + 3(0) = 15 - (-5)
20 + 0 = 15 + 5
20 = 20
x = -3
5(-3) + 3(8 - 2(-3)) = 15 - (-3 - 9)
-15 + 3(8 + 6) = 15 - (-3 - 9)
-15 + 3(14) = 15 - (-12)
-15 + 42 = 15 + 12
27 = 27
x = 0
5(0) + 3(8 - 2(0)) = 15 - (0 - 9)
0 + 3(8) = 15 - (-9)
0 + 24 = 15 + 9
24 = 24
je remarque peut importe le nombre choisi les equation
seront les meme comme
5x+3(8−2x)=15−(x−9)
5x+24-6x=15-x+9
-x+24=-x+24
