Question

a) - (-30) - x = - (+13)

- (+12) - ( +x) = 20

( -34) - x = - (-45)

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Answer 1

a) - (-30) - x = - (+13)

30 - x = -13

x = 30 - (-13)

x = 43

b) - (+12) - (+x) = 20

-12 - x = 20

x = -12 - 20

x = -32

c) ( -34) - x = - (-45)

-34 - x = 45

x = -34 - 45

x = -79.

Answer 2

a) - ( -30 ) - x = - ( 13 )

30 - x = -13

x = 30 + 13

x = 43

b) -( 12 ) - x = 20

-12 - x = 20

x = -12 - 20

x = -32

c) ( -34 ) - x = - ( -45 )

-34 - x = 45

x = -34 - 45

x = -79

Answer 3

\(-\left(-30\right)-x=-\left(+13\right)\)

\(\Leftrightarrow30-x=-13\)

\(\Leftrightarrow x=30 +13\)

\(\Leftrightarrow x=43\)

\(-\left(+12\right)-\left(+x\right)=20\)

\(\Leftrightarrow-20-x=20\)

\(\Leftrightarrow x=-20-20\)

\(\Leftrightarrow x=-40\)

\(-34-x=-\left(-45\right)\)

\(\Leftrightarrow x=-34-45\)

\(\Leftrightarrow x=-79\)

Answer 4

a) - ( -30 ) - x = - ( 13 )

            30 - x = -13

                   x = 30 + 13

                   x = 43

b) -( 12 ) - x = 20

        -12 - x = 20

                x = -12 - 20

                x = -32

c) ( -34 ) - x = - ( -45 )

        -34 - x = 45

                x = -34 - 45

                x = -79

Answer 5

\(-\left(-30\right)-x=-\left(+13\right)\)

\(\Rightarrow x=30+13\)

\(\Rightarrow x=43\)

\(-\left(+12\right)-\left(+x\right)=20\)

\(\Rightarrow-x=-12-20\)

\(\Rightarrow x=32\)

\(\left(-34\right)-x=-\left(-45\right)\)

\(x=-79\)