2 years ago

Solve for x: 20 = 3x -1

Mathematics

2 answers:

Feliz [49]2 years ago

7 0

20=3x-1

move -1 to the other side

sign changes from -1 to +1

20+1=3x-1+1

20+1=3x

21=3x

divide both sides by 3 to get x by itself

21/3=3/3x

Cross out 3 and 3, divide by 3 and then becomes 1*1*x=x

21/3=x

Answer:

x=7

Stells [14]2 years ago

3 0

Answer:

Let’s solve your equation step-by step.

20=3x-1

Step 1:flip the equation.

3x-1=20

Step 2:Add 1 to both sides.

3x-1+1=20+1

3x=21

Step 3:divide both sides by 3.

3x/3=21/3

X=7

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