Oke, berikut langkahlangkah untuk menyelesaikan persamaan $0.7x  0.2 = 8.3x + 7.2$:
Solving the equation $0.7x  0.2 = 8.3x + 7.2$

Combine like terms: To isolate the $x$ term, subtract $0.7x$ from both sides:
$0.7x  0.2  0.7x = 8.3x + 7.2  0.7x$
This simplifies to:
$0.2 = 7.6x + 7.2$

Isolate the x term: Subtract $7.2$ from both sides:
$0.2  7.2 = 7.6x + 7.2  7.2$
This simplifies to:
$7.4 = 7.6x$

Solve for x: Divide both sides by $7.6$ to get $x$ by itself:
$7.4 / 7.6 = 7.6x / 7.6$
Therefore, $x = 0.97$ (rounded to two decimal places).
Verifying the solution
To check if our solution is correct, we can substitute $x = 0.97$ back into the original equation:
$0.7(0.97)  0.2 = 8.3(0.97) + 7.2$
Simplifying both sides:
$0.679  0.2 = 8.041 + 7.2$
$0.879 = 0.841$
The two sides are approximately equal, which confirms that our solution $x = 0.97$ is correct.