Question

→ resolva←
a) 3a+8a=15
b) 6b+7b=15
c) 20m+7m=12
d) 30p=60
e) 40x-x=1a
f) 36p+8y=40
g) 0,3x-8,1x=0

Answer 1

a) 3a+8a=15 ==> 11a = 15 ==> a = 15/11
========================================
b) 6b+7b=15 ==> 13b = 15 ==> b = 15/13
========================================
c) 20m+7m=12 ==> 27m = 12 ==> m = 12/27
========================================
d) 30p=60 ==> p = 60/30 ==> p = 2
========================================
e) 40x-x=1a ==> 39x = a ==> x = a/39
========================================
f) 36p+8y=40  ==> 8y = 40 + 36p ==> y = 40 +36p
                                                                        8
===================================================
g) 0,3x-8,1x=0 ==> - 7,8x = 0(-1) ==> 7,8x=0 ==> x = 0