21.Simplify the algebraic expression and find its value if a = 2, b = –3 3 (a + b) +5b – 7
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Answered by
0
Answer:
by substituting a and b value in the expression
3(2-3) +5(-3) -7
=3(-1) -15-7
=-3-15-7= -10-15
therefore answer is -25
Answered by
0
Answer:
3(a+b)5b-7
3(2+(-3))+5x(-3) - 7
3x (-1)+(-15)-7
(-3)+(-15)-7
-18-7
-25
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