⓵ 0.8x + 5 = 0.2(40 - x)
0.8x + 5 = 0.2(40 - x)
0.2•40 0.2•x
0.8x + 5 = 8 - 0.2x
+0.2x +0.2x
x + 5 = 8
-5 -5
x = 3
⓶ 2(x - 5) + 7 = x
2(x - 5) + 7 = x
2•x 2•5
2x - 10 + 7 = x
-10+7
2x - 3 = x
-3 + 2x = x
-2x -2x
-3 = -x
÷-1 ÷-1
3 = x
⓷ 3x + 3 = 2(x + 7)
3x + 3 = 2(x + 7)
2•x 2•7
3x + 3 = 2x + 14
-3 -3
3x = 2x + 11
-2x -2x
x = 11
⓸ 5(x - 1) - 6x = -11x
5(x - 1) - 6x = -11x
5•x 5•1
5x - 5 - 6x = -11x
+5 +5
5x - 6x = -11x + 5
+11x +11x
5x - 6x + 11x = 5
10x = 5
÷10 ÷10
x = ½
⓹ 6(x + 2) - x = 4(x + 4) + 7
6(x + 2) - x = 4(x + 4) + 7
6•x 6•2 4•x 4•4
6x + 12 - x = 4x + 16 + 7
5x + 12 = 4x + 23
-12 -12
5x = 4x + 11
-4x -4x
x = 11
⓺ ½(x + 8) + 3/2x = 10
½(x + 8) + 3/2x = 10
½•x ½•8
½x + 4 + 3/2x = 10
-4 -4
½x + 3/2x = 6
2x = 6
÷2 ÷2
x = 3
⓻ ½x + 1/4 = x
½x + 1/4 = x
-½x -½x
1/4 = ½x
÷½ ÷½
½ = x
There you go! I really hope this helped, if there’s anything just let me know! ☻
