Question

What is the value of t? 1.4t−0.4(t−3.1)=5.8

Answer 1

1.4t-0.4t+1.24=5.8
1t=5.8-1.24=4.56
t=4.56

Answer 2

we have that

$1.4t-0.4(t-3.1)=5.8\\ 1.4t-0.4t+(0.4*3.1)=5.8$

Group terms that contain the variable t, and move the constant to the opposite side of the equation

$1.4t-0.4t+1.24=5.8\\ (1.4t-0.4t)=5.8-1.24\\ t=4.56$

therefore

the answer is

the value of t is equal to $4.56$