Question

solve using the addition principle. dont forget to perform a check.
-7.4 = -3.7 + x
the solution is x = \square.
(type an integer or a decimal.)

Explanation:

Step1: Isolate x via addition

Add 3.7 to both sides.
$$-7.4 + 3.7 = -3.7 + x + 3.7$$

Step2: Simplify both sides

Calculate the left-hand sum.
$$x = -7.4 + 3.7 = -3.7$$

Step3: Verify the solution

Substitute $x=-3.7$ into original equation.
$$-7.4 = -3.7 + (-3.7)$$
$$-7.4 = -7.4$$

Answer:

$-3.7$