0.2 * 3x−73x - 73x−7 - 0.2x = 1.8;
0.2 * 3x - 0.2 * 7 - 0.2x = 1.8;
0.6x - 1.4 - 0.2x = 1.8;
0.6x - 0.2x = 1.8 + 1.4;
0.4x = 3.2;
x = 8.
0.2 * 3x−73x - 73x−7 - 0.2x = 1.8;
0.2 * 3x - 0.2 * 7 - 0.2x = 1.8;
0.6x - 1.4 - 0.2x = 1.8;
0.6x - 0.2x = 1.8 + 1.4;
0.4x = 3.2;
x = 8.