Solving multi-step problems using linear equations in one variable

What should we do first to solve for x?

y=mx+b

• Add b

• Subtract b

• Multiply m

• Divide by m

Solve for x

y = mx+b

• m+y=xb

• m-y = xb

• y-b/m=x

• y+b/m=x

w=g+7
solve for g

• g=w/7
• g=w+7
• g=7w
• g=w-7

b + a = m

b =

• m - a

• m + a

• a - m

• a + m

a=2xy

Solve for y

• y=a/2x

• y=a2x

• y=2x/a

• x=a/2y

Answer explanation

To solve for y, divide both sides of the equation by 2x, giving y=a/2x. Therefore, the correct answer is y=a/2x.

Solve each equation for the indicated variable.

• A

• B

• C

• D

 $A=\frac{a+b+c}{3}$  
Solve for c

• c= 3A + a + b

• c = A - 3 - a - b

• c = 3A - a - b

ab + x = c

• x = c - ab - y

• x= y(c-ab)

• x= c_

  aby

solve for x

x + w + b = g

• x = g - w - b

• x = g - w + b

• x = g + b + w

• x = b - g - w

Solve for y in the expression: $2w-y=7w-2$