Respuesta:
a) 3(x+2)=12
1. 3x+6= 12; 3x=12-6; 3x=6; x=6/3; x=3
2. x+2=12/3; x+2=4; x=4-2; x=2
b) (12x-8)/2=14
1. 6x-4=14; 6x=14; x=14/6; x=2.3333
2. 12x-8=14/2; 12x-8=7; 12x=7+8; 12x=15; x=15/12; x=1.25
c) (2×-5)4=20
1. 8x-20=20; 8x=20+20; 8x=40; x=40/8; x=5
2. 2x-5=20/4; 2x-5=5; 2x=5+5; 2x=10; x=10/2; x=5
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Respuesta:
a) 3(x+2)=12
1. 3x+6= 12; 3x=12-6; 3x=6; x=6/3; x=3
2. x+2=12/3; x+2=4; x=4-2; x=2
b) (12x-8)/2=14
1. 6x-4=14; 6x=14; x=14/6; x=2.3333
2. 12x-8=14/2; 12x-8=7; 12x=7+8; 12x=15; x=15/12; x=1.25
c) (2×-5)4=20
1. 8x-20=20; 8x=20+20; 8x=40; x=40/8; x=5
2. 2x-5=20/4; 2x-5=5; 2x=5+5; 2x=10; x=10/2; x=5