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a) 5+2x=25
b) 14=5x-6
c) 15=4x+7

 Sep 28, 2020
 #1
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First one (thers are similar)

 

5 + 2x = 25     subtract 5 from both sides of the equation to get

2x = 20            now divide both sides by to to get

x = 10 

CHECK:    5 + 2(10) = 25

                  5 + 20 = 25

                       25   = 25     !   Verified !   cheeky

 

You can do the others....

 Sep 28, 2020
 #2
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for simultanous equations. I found https://www.equationcalc.com/simultaneous-equation-solver  useful

 Sep 28, 2020

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