Solve 4*10^-15=1.6*10^2-19*x

$$4 \times { 10 }^{ -15 } =1.6 \times { 10 }^{ 2-19 } \times x$$

Solve for x

$$x=250$$

Steps for Solving Linear Equation

Calculate 10 to the power of -15 and get \frac{1}{1000000000000000}.

$$4\times \frac{1}{1000000000000000}=1.6\times 10^{2-19}x$$

Multiply 4 and \frac{1}{1000000000000000} to get \frac{1}{250000000000000}.

$$\frac{1}{250000000000000}=1.6\times 10^{2-19}x$$

Subtract 19 from 2 to get -17.

$$\frac{1}{250000000000000}=1.6\times 10^{-17}x$$

Calculate 10 to the power of -17 and get \frac{1}{100000000000000000}.

$$\frac{1}{250000000000000}=1.6\times \frac{1}{100000000000000000}x$$

Multiply 1.6 and \frac{1}{100000000000000000} to get \frac{1}{62500000000000000}.

$$\frac{1}{250000000000000}=\frac{1}{62500000000000000}x$$

Swap sides so that all variable terms are on the left hand side.

$$\frac{1}{62500000000000000}x=\frac{1}{250000000000000}$$

Multiply both sides by 62500000000000000, the reciprocal of \frac{1}{62500000000000000}.

$$x=\frac{1}{250000000000000}\times 62500000000000000$$

Multiply \frac{1}{250000000000000} and 62500000000000000 to get 250.

$$x=250$$