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1/7 + 5/3x

1 x 3x / 7 x 3x + 5 x7 / 3x /7

= 3x/21x + 35/21x

= 3x + 35 / 21x

Answered by Rachel C. • Maths tutor

3331 Views

4x^2+5x+2=10

x=0.921 x=-2.17

Answered by Charles K. • Maths tutor

2804 Views

How do you solve a set of three similatenous equations with three unknown variables?

You should manipulate the equations into a form where you can eliminate a variable, using two of the equations. From here, you should be left with two new equations and two unknown variables. Repeat the s...

Answered by Matthew G. • Maths tutor

3062 Views

Find x in the following linear equation (5x-3)/4=2

x=11/5

Answered by Will P. • Maths tutor

3087 Views

Two particles A and B of mass 2kg and 3kg respectively are moving head on. A is moving at 5m/s and B is moving at 4m/s. After the collision, A rebounds at 4m/s. What is the speed of B and what direction is it moving in?

Using conservation of momentum, m1u1 + m2u2 = m1v1 + m2v2, set m1 = 2kg, m2 = 3kg, u1 = 5m/s, u2 = -4m/s and v1 = -4m/s. Substitute these into the equation to get 25 + 3(-4) = 2*(-4) + 3*v2 10 - ...

Answered by Amber S. • Maths tutor

4894 Views