Respuesta:
Explicación paso a paso:
X+5=-8 X = 8 - 5 X = 3
X-7=21 X = 21 + 7 X = 28
2x+3 =15 X = -15 -3 X = -18
3X -4 = 16 3X = 16 + 4 3X = 20 X = 20/3
3x=21 X = 21/3 X = 7
a) x+5=-8
x+5-5=-8-5
x=-13
b) x-7=21
x-7+7=21+7
x=28
c) 2x+3=15
2x=15-3
2x=12
2x/2=12/2=6
x=6
d)3x-4=16
-4-16=-3x
-20=-3x
-3x/-3=-20/-3=20/3
x=20/3
e)3x=21
3x/3=21/3=7
x=7
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Verified answer
Respuesta:
Explicación paso a paso:
X+5=-8 X = 8 - 5 X = 3
X-7=21 X = 21 + 7 X = 28
2x+3 =15 X = -15 -3 X = -18
3X -4 = 16 3X = 16 + 4 3X = 20 X = 20/3
3x=21 X = 21/3 X = 7
Explicación paso a paso:
a) x+5=-8
x+5-5=-8-5
x=-13
b) x-7=21
x-7+7=21+7
x=28
c) 2x+3=15
2x=15-3
2x=12
2x/2=12/2=6
x=6
d)3x-4=16
-4-16=-3x
-20=-3x
-3x/-3=-20/-3=20/3
x=20/3
e)3x=21
3x/3=21/3=7
x=7