Répondre :
A = -2(x+7) = -2x -14 x -14
-2 -2
x = 3
-2(3+7) = -6 -14 = -20 = 10
-2 -2 -2
x = 2/3
-2(2/3 +7) = -2(2/3 +21/3) = -2( 23/3) = -46/3
-2 -2 -2 -2
57 mm = 5,7 cm m dm cm mm
5 7
-2 -2
x = 3
-2(3+7) = -6 -14 = -20 = 10
-2 -2 -2
x = 2/3
-2(2/3 +7) = -2(2/3 +21/3) = -2( 23/3) = -46/3
-2 -2 -2 -2
57 mm = 5,7 cm m dm cm mm
5 7