Question

Algebra Q92:
0.5 x 80 + 0.3x = 0.4(80 + x)
Find 2x.

Answer 1

40+0.3x=32+0.4x
40-32=0.4x-0.3x
8=0.1x
80=x
2x=160

Answer 2

160

Explanation:

0.5 x 80 + 0.3x = 0.4(80 + x)

0.5 x 80 + 0.3x = 32 + 0.4x

40 + 0.3x = 32 + 0.4x

-32 -32

8 + 0.3x = 0.4x

- 0.3x -0.3x

8 = 0.1x

/0.1 /0.1

80 = x

2x so... 2(80)... 2x = 160