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3 votes
1.-7x+4(1-2x)=8(-x+2)-8x
2n-5n=-5(5n+3)+3(-n-3)

User Mayid
by
7.5k points

1 Answer

4 votes
−7x+4(1−2x)=8(2−x)−8x

Expand.

7
x
+
4

8
x
=
16

8
x

8
x
−7x+4−8x=16−8x−8x

Simplify

7
x
+
4

8
x
−7x+4−8x to

15
x
+
4
−15x+4.

15
x
+
4
=
16

8
x

8
x
−15x+4=16−8x−8x

Simplify
16

8
x

8
x
16−8x−8x to
16

16
x
16−16x.

15
x
+
4
=
16

16
x
−15x+4=16−16x

Subtract
4
4 from both sides.

15
x
=
16

16
x

4
−15x=16−16x−4

Simplify
16

16
x

4
16−16x−4 to

16
x
+
12
−16x+12.

15
x
=

16
x
+
12
−15x=−16x+12

Add
16
x
16x to both sides.

15
x
+
16
x
=
12
−15x+16x=12

then Simplify

15
x
+
16
x
−15x+16x to
x
x.
x
=
12

x=12 answer
User Kolzar
by
6.9k points