multiply the ones in bracket by the L
T = 7× L + L × RS
T = 7L + LRS
making S the subject by transferring 7L to the left hand side of the equation.
T - 7L = LRS
dividing through by LR
The equation would be y=32x+550. 32 an hour is represented by 32x since she earned 32 an hour. 550 is the extra amount she is getting paid.
I hope this helps.