7.(25.x)-20=190
7.(25.x)=190+20
7.(25.x)=210
25.x=210:7
25.x=30
x=30:25
x=1,2
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7.(25.x)-20=190
7.(25.x)=190+20
7.(25.x)=210
25.x=210:7
25.x=30
x=30:25
x=1,2
7.(25+x)-20=190
Tìm x
7.(x+52)-20=190
Tìm x :
7 ( x + 52 ) - 20 = 190
7 ( x + 52 ) - 20 = 190
7 [ x + 5 ] - 20 = 190 155 - 10 [ x + 1 ]= 55
6 [ x + 2 mũ 3 ] + 40 = 100 15x - 133 = 17
90 [ x + 2 ] = 45 14x + 54= 82
17x - 20 =14
Bài 2.Tìm x
a,72-(4x+15)=45
b,7.(x+5^2)-20=190
22 (x+32)-5 =55
7(x+52) - 20 = 190
22 (x+32 ) -5 = 55
7 (x+52 ) - 20 = 190
22(x+32)-5=55
7(x+52)-20 =190