0.3(t-7)=0.4t

Solution for 0.3(t-7)=0.4t equation:

Simplifying
0.3(t + -7) = 0.4t

Reorder the terms:
0.3(-7 + t) = 0.4t
(-7 * 0.3 + t * 0.3) = 0.4t
(-2.1 + 0.3t) = 0.4t

Solving
-2.1 + 0.3t = 0.4t

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '-0.4t' to each side of the equation.
-2.1 + 0.3t + -0.4t = 0.4t + -0.4t

Combine like terms: 0.3t + -0.4t = -0.1t
-2.1 + -0.1t = 0.4t + -0.4t

Combine like terms: 0.4t + -0.4t = 0.0
-2.1 + -0.1t = 0.0

Add '2.1' to each side of the equation.
-2.1 + 2.1 + -0.1t = 0.0 + 2.1

Combine like terms: -2.1 + 2.1 = 0.0
0.0 + -0.1t = 0.0 + 2.1
-0.1t = 0.0 + 2.1

Combine like terms: 0.0 + 2.1 = 2.1
-0.1t = 2.1

Divide each side by '-0.1'.
t = -21

Simplifying
t = -21