S = ΔD/ΔT
Solve for ΔD

1.   ?    ΔD = SΔT
2.   ?    ΔD = S/ΔT
3.   ?    ΔD = S + ΔT
4.   ?    ΔT = ΔDS

ΔD = D₂ - D₁
Solve for D₂.

1.   ?    D₂ = ΔD + D₁
2.   ?    D₂ = ΔD - D₁
3.   ?    D₂ = ΔD/D₁
4.   ?    D₂ = ΔD(D₁)

If F=ma,
solve for "a".

1.   ?    a = Fm
2.   ?    a = F/m
3.   ?    F/a = m
4.   ?    a = F - m

D₂ = ΔD + D₁
Solve for D₁.

1.   ?    D₁ = D₂ - ΔD
2.   ?    D₁ = D₂ + ΔD
3.   ?    D₁ = D₂/ ΔD
4.   ?    ΔD = D₂ - D₁

F/m = a.
Solve for F.

1.   ?    F = ma
2.   ?    F = a/m
3.   ?    F = a + m
4.   ?    a = Fm

a = ΔS/ΔT
Solve for ΔS

1.   ?    ΔS = aΔT
2.   ?    ΔS = a/ΔT
3.   ?    ΔS = a + ΔT
4.   ?    ΔT = ΔSa

S = ΔD/ΔT
Solve for ΔT

1.   ?    ΔT = ΔD/S
2.   ?    SΔT = ΔD
3.   ?    S/ΔD = ΔT
4.   ?    ΔT = ΔDS

T₂ = ΔT + T₁
Solve for T₁.

1.   ?    T₁ = T₂ - ΔT
2.   ?    T₁ = T₂ + ΔT
3.   ?    T₁ = T₂/ ΔT
4.   ?    ΔT = T₂ - T₁

ΔT = T₂ - T₁
Solve for T₂.

1.   ?    T₂ = ΔT + T₁
2.   ?    T₂ = ΔT - T₁
3.   ?    T₂ = ΔT/T₁
4.   ?    T₂ = ΔT(T₁)

W = Fd
Solve for F.

1.   ?    F = W/d
2.   ?    F = Wd
3.   ?    d = W/f
4.   ?    F = W - d