Solve -7,5+50000I_{b}+0,7+1000((175+1)I_{b})=0

$$- 7,5 + 50000 I _ { b } + 0,7 + 1000 ( ( 175 + 1 ) I _ { b } ) = 0$$

Solve for I_b

$$I_{b}=\frac{17}{565000}\approx 0,000030088$$

Steps for Solving Linear Equation

Add -7,5 and 0,7 to get -6,8.

$$-6,8+50000I_{b}+1000\left(175+1\right)I_{b}=0$$

Add 175 and 1 to get 176.

$$-6,8+50000I_{b}+1000\times 176I_{b}=0$$

Multiply 1000 and 176 to get 176000.

$$-6,8+50000I_{b}+176000I_{b}=0$$

Combine 50000I_{b} and 176000I_{b} to get 226000I_{b}.

$$-6,8+226000I_{b}=0$$

Add 6,8 to both sides. Anything plus zero gives itself.

$$226000I_{b}=6,8$$

Divide both sides by 226000.

$$I_{b}=\frac{6,8}{226000}$$

Expand \frac{6,8}{226000} by multiplying both numerator and the denominator by 10.

$$I_{b}=\frac{68}{2260000}$$

Reduce the fraction \frac{68}{2260000} to lowest terms by extracting and canceling out 4.

$$I_{b}=\frac{17}{565000}$$