Explicación paso a paso:
a, 3×-6×=10
3×=10
×÷10
=9,1
c,5×= -10+2
5×= -10+2
×=8÷5
=5,3
b,3(2×+×)4+2=3×+2
3( 3×) +6 =3×+2
3(3×) 3×= -6+2
9×+3×=4
12×=4
×=12÷4
×=3
d,2× -7(3 -×)=2×+30
3+7(2× -×)=2×+30
30 -10=2× -×
20=×
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Explicación paso a paso:
a, 3×-6×=10
3×=10
×÷10
=9,1
c,5×= -10+2
5×= -10+2
×=8÷5
=5,3
b,3(2×+×)4+2=3×+2
3( 3×) +6 =3×+2
3(3×) 3×= -6+2
9×+3×=4
12×=4
×=12÷4
×=3
d,2× -7(3 -×)=2×+30
3+7(2× -×)=2×+30
30 -10=2× -×
20=×